IB Biology IA ideas (30+ topics) - A Goldmine You Can't Ignore.

Unleash your potential in IB Biology with our exclusive list of 30+ captivating IA ideas! Discover the secrets to scoring top marks & nail your IA now!

IB Biology IA ideas (30+ topics) - A Goldmine You Can't Ignore.

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Sitting in that quiet corner, sipping hot chocolate, hoping it rains IB Biology IA ideas, instead, going blank and utterly confused?

We don't want that to happen, do we? 

Choosing the perfect IB Biology IA idea is only the first step in making one's IB Biology Investigation, but definitely, the most significant. IB Biology IA Ideas won't strike out of the blue, but here's a list of  30+ IB Biology IA ideas  to inspire and stimulate your grey cells! Selecting an IBxq Biology IA idea has always been challenging! 

Before we look for IB Biology IA ideas, let's clearly comprehend the  IB Biology Diploma Programme Subject , its objectives, partwise breakdown, and what IB expects of you.

The IB IAs are essential to one's overall subject performance since they make up 20% of the final score. Internal Assessments are the perfect way to get students to put their knowledge to use by Observing, Questioning, and Investigating.   Personal engagement ,  Exploration ,  Analysis ,  Evaluation ,  and   Communication  are the criteria against which the investigation is assessed.            

The sure-shot way to ace one's IB Biology IA, or any IA, is by picking a topic that sparks one's interest. A well-planned , structured, and executed  IA has been undertaken with zeal and enthusiasm. It is all the same when choosing that one Biology IA idea from a platter full of inspiration. 

Before we dive more in-depth, you should check out our  premium IB Biology SL Notes  to own your Biology SL papers! Along with a bundle of  Past Papers , these  premium SL notes  include guides for your  Extended Essay  and  Internal Assessments  with helpful examples! You certainly want to take advantage of these! Browse  these  for more information! 

When it comes to selecting from several IB Biology IA ideas for your investigation, it is essential to note that your IA would either require you to:

  • Carry out experimental research in the laboratory or
  • Draw interpretation from a credible database or
  • Make a detailed analysis using a simulation/modelling.

Either way, you must connect to your topic and portray personal engagement as it lays the foundation for the rest of your investigation. Proper research is a bare minimum, and the rest follows. Here's a quick summary of how you are supposed to choose an appropriate IB Biology IA idea for your report:

  • Know your interest:  Go through several IA ideas to understand what all topics are in sync with the IB Biology curriculum and if something grabs your attention, hold on to it!
  • Keep it specific:  The idea should be more generic and more complex. An ideal IA idea reeks of originality and leaves room for proper investigation and analysis.
  • Let it be realistic:  Outline the Equipment, time, and resources to check its feasibility.

Tada! There you go! 

Now that you know how to settle on that one perfect topic, let's quickly brief ourselves on the proper planning and procedure involved in the making of an IB Biology IA:

Concise Research Question:  

Your Research Question and the Aim of the Investigation are separate sub-headings with different implications. Keep the research question brief and relevant. The Aim answers Why while the Research Question answers the What.

  • It is essential to set the Research Question in the background of the chosen topic. My Background, IB expects you to briefly explain what encouraged you to select a particular topic and, hopefully, a personal story that validates your choice and engagement. For instance, if you choose to investigate how light levels affect the predation of peppered moths, you could set a background that you have gained a fascination for that species ever since it was introduced to you for some explanation in your regular classes and eventually give more scientific basis for your choice.
  • Independent, Dependent variables need to be highlighted, as should the hypothesis. State your hypothesis; it is important in the context of your research. Constraints, if any, need to be mentioned as well. Remember, the Independent variable is one that you are allowed to change(just one); the Dependent variable is one that you measure as it changes with the Independent variable; all the other experiment conditions must be kept constant to ensure that the experiment is fair.
  • The procedure used should be well structured.
  • Tables, Graphs, etc., should be used.
  • Perform the relevant analysis, consider the research question, and conclude. 
  • Limitations and Improvements should be specified.

Acknowledging the safety protocols established by IB and considering the ethical aspects of your investigation is imperative. 

Focus on the question:

"If there are any ethical implications to your report, how do you plan on minimizing the environmental impact of your experiment?" 

Citing documents/web pages and giving references is another crucial aspect of your IA that needs to be taken care of. 

An important thing to note here is that although you are allowed to take inspiration from existing research, papers/journals, you are expected to give a novel perspective to the idea while producing it in your investigation.

For example, an idea inspired by how the soil pH affects seed germination could be investigated in a new light; think of other factors controlling/affecting seed germination. You could progress further in your report with a focus on quantitative data.

With all the necessary information at your disposal, it is time to present some fantastic IB Biology IA ideas to encourage you to put your thinking caps on and take on the challenge with newfound zeal! These ideas are meant to give you a little head start along this path; your final IB Biology Investigation idea is your interpretation of one.

Without further adieu, let's dive headfirst into  30+ IB Biology IA ideas  for your Biology IA Investigation!

  • Reference to Course:   Molecular Biology  (Metabolism, Cell Respiration, Photosynthesis)
  • Lab, Simulation-based
  • Reference to Course:  Molecular Biology (Metabolism, Cell Respiration, Photosynthesis)
  • Experimental 
  • Reference to Course:  Cell Biology (Membrane Structure)
  • Experimental
  • Reference to Course:  Plant Biology
  • Reference to Course:  Molecular Biology (Enzymes)
  • Reference to Course:  Cell Biology
  • Simulation/Modelling
  • Reference to Course:  Cell Biology (Osmosis)
  • Database based
  • Reference to Course:   Molecular Biology (Enzymes)
  • Reference to Course:  Ecology
  • Reference to Course:  Microbiology
  • Reference to Course:  Molecular Biology(Enzymes)
  • Experimental, Simulation-based
  • Reference to Course:  Buffers
  • Reference to Course:  Human Physiology
  • Reference to Course:  Molecular Biology(Enzymes)
  • Simulation Analysis
  • Database, Experimental
  • Reference to Course:  Plants Physiology

These ideas are for you to start exploring and begin! Take inspiration from these and research further to land on that one idea that gets you going!

But is that it? Certainly not! 

Here are a couple of other ideas you could browse and eventually take inspiration from:

  • Effect of Different Fertilizers on  Eutrophication .
  • Analyzing Milk Spoilage under varying conditions of Temperature, Sunlight, etc.
  • Exploring how a particular variable affects the  germination of seeds .
  • Investigating the rate of oxygen production of seaweed with variation in light intensity.
  • To prevent microbial growth, explore better ways to clean household items(for example - mats).
  • Studying the effect of temperature on photosynthesis in Green Gram(Vigna Radiata).
  • Understanding what effect different ethanol concentrations have on cell membranes.
  • Studying the biology behind  Schizophrenia .
  • Investigating the decay time of different  Genetically Modified Foods .
  • Understanding the impact of different variables on vegetable decay/ Exploring other methods to prevent vegetable decay.

And that's that!

These little ideas will help you brainstorm and explore further the vast yet intriguing expanse of biology. IB Biology curriculum expects you to appreciate scientific problems in a global context with stimulating opportunities, and IB Biology IAs help you accomplish just that. It might seem like a lot of work, but with the right topic, you will surpass your expectations! On this note, we wish you all the very best for your IB Biology IA Journey :)

Want some A-quality guidance? Look no further; at Nail IB, we have assembled premium content for you to ace your IBs, and you should check out our resources for a smooth IB experience. Click  here  for top-notch IB resources or to assess how your prep is going! 

This article will be a foundation for you to get going on that IB Biology IA Investigation of yours!  

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Guide for Students to the IB Biology IA Format

A fresh pair of eyes can catch mistakes you may have missed in IB Biology IA.

Ah, the allure of the International Baccalaureate (IB) ! While involved with IB, I’ve noticed that mastering the IB Biology IA is no small feat. However, it’s not as intimidating as it might seem at first. This article reviews the essential IB Biology IA format and structure, sprinkled with insights from my years of experience.

When I first encountered the IB Biology IA, I was a tad overwhelmed. Yet, as I explored more, I realized its fundamental importance. So, what exactly is the IB Biology IA? It’s a key assessment piece for IB students that evaluates their experimental and investigative skills. Furthermore, proper format and structure can significantly impact your final grade. From my experience, laying a solid foundation is vital for success.

Critical Components of the IB Biology IA Format

The IA is a laboratory report that is an integral part of the IB Biology curriculum. For assessments through May 2025, this 6-12 page work should include a research question, detailed methodology, data interpretation, and a concluding section.

But to understand the intricacies of the IB Biology IA, we need to peel back the layers. In my years of experience, getting a grip on these elements has often been the turning point for many students.

So, understanding and perfecting these sections is instrumental in crafting a standout IB Biology IA . And believe me, with the right approach, it’s more than achievable!

Title Page and Research Question

The beginning is often the most crucial. Just as a book is judged by its cover, your IA begins its impression with the title page. It should be sharp and concise but comprehensive enough to provide an inkling of the direction of your investigation. Alongside, the research question is the backbone of your research, guiding every step. It’s paramount for it to be precise and well-defined, illuminating the research path for the reader. By the way, you can read more about the IB Internal Assessment format in our blog.

Introduction and Background

It is where you roll out the context, much like a red carpet for what follows. This section offers the essential backdrop, helping readers grasp the significance of your study. Going by the general IB criteria, it’s pivotal to elucidate the relevance and importance of your chosen topic here, providing a solid rationale for its investigation.

Personal Engagement and Exploration

This section is truly a window to your academic soul. It reveals your genuine interest, passion, and personal connection to the IB Biology topic . It’s a space to articulate why this particular topic resonated with you. Over the years, I’ve discerned that students who showcase genuine enthusiasm and curiosity here tend to elevate their IAs to a new level.

Methods and Materials

Venturing into the practical realm is where you lay out your experimental master plan. Document every apparatus, tool, and step taken during your research. The idea is to draft this section with such clarity and precision that anyone reading it could replicate your experiment seamlessly. 

So, the “Methods and Materials” section stands as your guidepost, shedding light on your experimental process. Here is an example of a step-by-step procedure:

  • Preliminary Setup . Always start with how you prepared the lab space, ensuring all equipment was clean, sterile (if necessary), and within easy reach.
  • Experiment Initiation . It could be preparing a solution, calibrating an instrument, or setting up the apparatus.
  • Data Collection Phase . Describe in detail how you collected data, at what intervals, and using which tools. For example, “Using a calibrated pipette, I extracted 5ml of the solution every 10 minutes.”
  • Safety Measures . Always document any safety protocols followed during the experiment, such as ensuring adequate ventilation or handling chemicals carefully.
  • Experiment Conclusion . Detail how you wrapped up the experiment . It could include turning off equipment, safely disposing of materials, or storing data.
  • Post-Experiment Cleanup . It is always a vital step to indicate how you restored the lab space to its original condition and how you stored or disposed of used materials.

The aim is to write this section thoroughly so that another student, perhaps halfway across the world, could read your description and carry out the same experiment with identical results. Clarity and meticulousness can raise your IA to a commendable standard.

With the right approach, the path to an impressive IB Biology IA becomes clearer.

Data Collection and Analysis

Ah, the realm of empirical evidence! As I’ve often reiterated in my interactions, this section forms the core of your IA. It’s where your observations and findings come alive. But numbers alone won’t suffice. Getting into analysis, identifying patterns, and drawing insightful conclusions is crucial. Precision and accuracy are the linchpins here.

Conclusion and Evaluation

This segment calls for introspection and a broad overview as we round off. Draw overarching inferences from your research, going beyond just stating the results. Understand the broader implications of your findings. Moreover, put on your critic’s glasses, judiciously assessing your study’s strengths while acknowledging its weaknesses.

Topics to Read:

  • Understanding the IB Curriculum: A Beginner’s Guide
  • Guide to the Official IBO Website for IB Student Advantages and Growth
  • How to Manage Time Effectively as an IB Student
  • How to Write a Strong IB IA Proposal?
  • The Benefits of Pursuing the IB Diploma Programme
  • What to Do if You Don’t Pass Your IB IA? How to Succeed Next Time?
  • Can I Order IB Internal Assessment Written Online?

Tips for Excelling in Your IB Biology IA

The path to mastering the IB Biology IA can be challenging, but it can be a smooth ride with a few strategic pointers. Having been deeply involved with the IB for years, I’ve collected vital insights that can distinguish between a satisfactory and a stellar IA . Let’s get right into them.

1. Selecting a Relevant Research Question

The foundation of your entire IA is your research question. What’s the secret sauce to crafting the perfect one? It’s all about relevance. Ensure that your question aligns neatly with the biology syllabus.

From my numerous sessions and interactions, a research question that resonates well with the core curriculum often garners more appreciation. Finding that sweet spot between ambition and practicality is also pivotal. While aiming high is commendable, choosing a feasible question within your means and resources is crucial.

2. Prioritizing Accurate Data Collection

Data is the heartbeat of your IA. Precise collection is non-negotiable. Here’s a valuable piece of advice I’ve echoed throughout my years — always double, if not triple, check your data. A minor mistake can alter your results significantly. Consistency is vital in this aspect. Make sure your data collection methods are systematic, repeatable, and free of any biases.

3. Emphasizing Personal Engagement

It is where your unique touch makes a difference. The IA isn’t just about presenting facts but also about your connection and enthusiasm for the topic. Standout IAs often have a strong undercurrent of genuine interest and dedication. From my vast experience, when students infuse their work with sincere passion, it shines through, making the IA genuinely memorable:

  • Initial Curiosity . Begin by shedding light on what piqued your interest in the topic.
  • Challenges and Overcoming Them . Maybe you faced difficulty sourcing materials or grappled with a particular concept.
  • Moments of Eureka . Highlight instances during your research when things clicked, or you experienced breakthrough moments.
  • Personal Stories . You may have always been fascinated by plant biology because you used to garden with a family member, or perhaps a unique health challenge drove your interest in human biology.
  • Reflections . Share your introspective moments. How has this research changed or deepened your understanding of the topic? How has it influenced your perspective or future aspirations in biology?

Remember, the personal engagement section is your canvas. It’s an opportunity to paint a picture of the researcher and the individual behind the research. By emphasizing these elements, you elevate the depth of your IA and create a resonant narrative that reviewers and readers can connect with.

4. Reflection and Evaluation of Your Findings

After all the rigorous work, it’s essential to pause and reflect. It involves not merely stating your results but also pondering their significance. How do your findings fit into the larger framework of biological understanding? Additionally, always be ready to assess your work critically. Pinpoint areas of improvement and suggest potential refinements. Such a holistic perspective adds depth to your IA and showcases your understanding and maturity.

Don’t let the stress of choosing an IA topic hold you back.

Are you struggling to come up with topic suggestions for your IB Internal Assessment?

Our experienced writers can help you choose the perfect topic for your IA

Tailored to your specific subject and requirements.

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Common Mistakes to Avoid in IB Biology IA Structure

Over the years, I’ve seen students make the same mistakes. Let’s ensure you’re not one of them!

1. Skipping Peer Review and Feedback

In the thick of research and writing, it’s easy to become myopic and miss out on tiny errors or areas of improvement. That’s where a second set of eyes becomes invaluable. Peer reviews or feedback from mentors can offer fresh perspectives, identify overlooked mistakes, or even provide insights that can elevate the quality of your work. From my experience, students who embrace feedback often end up with more polished and well-rounded IAs.

2. Inconsistent Data Collection Methods

While the methodology might be sound, inconsistency in data collection can introduce significant errors. Maintaining uniformity throughout the data collection phase is crucial. For instance, if you’re measuring plant growth, ensuring that measurements are taken simultaneously, under the same conditions, can make a difference.

3. Neglecting the Significance of the Research Question

The research question is the north star of your IA. Sometimes, students opt for broad or overly ambitious questions, convoluting the research process. It’s essential to choose a question that’s both relevant and feasible, ensuring that it aligns with the IB Biology syllabus and is achievable within the scope of the IA.

4. Not Justifying Methodological Choices

Simply listing out methods isn’t enough. It’s crucial to explain why a particular way was chosen and its relevance to the research question. Offering a rationale can give depth to the methodology section and showcase a deeper understanding of the research process.

Conclusion: Perfecting Your IB Biology IA

The IB Biology IA format and structure might seem daunting initially, but it becomes manageable with the proper guidance and preparation. I believe that with dedication and focus, every student can succeed in their IB Biology IA. Remember, it’s a marathon, not a sprint. 

In conclusion, with the right approach and these strategic tips in your arsenal, the path to creating an impressive IB Biology IA becomes much more straightforward. Combine these insights with dedication, and you’re on your way to success! Here’s wishing you all the very best! And remember, you can always get help with IB Biology IA from our experienced writers.

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Nora Spinster

Nora Spinster is a multi-talented individual who is an educator, lawyer, youth, expert IB tutor, education activist, and language and writing enthusiast. Nora has a wealth of experience in copywriting, having worked with various organizations and businesses to craft compelling and effective copy. Nora has published articles on young learners and teenage students in the International House Journal and occasionally posts on ibwritingservice.com educational blog

  • Nora Spinster https://ibwritingservice.com/blog/author/noraspinster/ IB vs. National Curriculum. The Benefits of an International Perspective
  • Nora Spinster https://ibwritingservice.com/blog/author/noraspinster/ How to Engage in Constructive Feedback in the IB?
  • Nora Spinster https://ibwritingservice.com/blog/author/noraspinster/ Does LSE Accept IB? Insights for IB Students
  • Nora Spinster https://ibwritingservice.com/blog/author/noraspinster/ Does King's College Accept IB? IB Requirements for King's College

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International Baccalaureate (IB)

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IB students around the globe fear writing the Extended Essay, but it doesn't have to be a source of stress! In this article, I'll get you excited about writing your Extended Essay and provide you with the resources you need to get an A on it.

If you're reading this article, I'm going to assume you're an IB student getting ready to write your Extended Essay. If you're looking at this as a potential future IB student, I recommend reading our introductory IB articles first, including our guide to what the IB program is and our full coverage of the IB curriculum .

IB Extended Essay: Why Should You Trust My Advice?

I myself am a recipient of an IB Diploma, and I happened to receive an A on my IB Extended Essay. Don't believe me? The proof is in the IBO pudding:

body_ibeescore.png

If you're confused by what this report means, EE is short for Extended Essay , and English A1 is the subject that my Extended Essay topic coordinated with. In layman's terms, my IB Diploma was graded in May 2010, I wrote my Extended Essay in the English A1 category, and I received an A grade on it.

What Is the Extended Essay in the IB Diploma Programme?

The IB Extended Essay, or EE , is a mini-thesis you write under the supervision of an IB advisor (an IB teacher at your school), which counts toward your IB Diploma (learn more about the major IB Diploma requirements in our guide) . I will explain exactly how the EE affects your Diploma later in this article.

For the Extended Essay, you will choose a research question as a topic, conduct the research independently, then write an essay on your findings . The essay itself is a long one—although there's a cap of 4,000 words, most successful essays get very close to this limit.

Keep in mind that the IB requires this essay to be a "formal piece of academic writing," meaning you'll have to do outside research and cite additional sources.

The IB Extended Essay must include the following:

  • A title page
  • Contents page
  • Introduction
  • Body of the essay
  • References and bibliography

Additionally, your research topic must fall into one of the six approved DP categories , or IB subject groups, which are as follows:

  • Group 1: Studies in Language and Literature
  • Group 2: Language Acquisition
  • Group 3: Individuals and Societies
  • Group 4: Sciences
  • Group 5: Mathematics
  • Group 6: The Arts

Once you figure out your category and have identified a potential research topic, it's time to pick your advisor, who is normally an IB teacher at your school (though you can also find one online ). This person will help direct your research, and they'll conduct the reflection sessions you'll have to do as part of your Extended Essay.

As of 2018, the IB requires a "reflection process" as part of your EE supervision process. To fulfill this requirement, you have to meet at least three times with your supervisor in what the IB calls "reflection sessions." These meetings are not only mandatory but are also part of the formal assessment of the EE and your research methods.

According to the IB, the purpose of these meetings is to "provide an opportunity for students to reflect on their engagement with the research process." Basically, these meetings give your supervisor the opportunity to offer feedback, push you to think differently, and encourage you to evaluate your research process.

The final reflection session is called the viva voce, and it's a short 10- to 15-minute interview between you and your advisor. This happens at the very end of the EE process, and it's designed to help your advisor write their report, which factors into your EE grade.

Here are the topics covered in your viva voce :

  • A check on plagiarism and malpractice
  • Your reflection on your project's successes and difficulties
  • Your reflection on what you've learned during the EE process

Your completed Extended Essay, along with your supervisor's report, will then be sent to the IB to be graded. We'll cover the assessment criteria in just a moment.

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We'll help you learn how to have those "lightbulb" moments...even on test day!  

What Should You Write About in Your IB Extended Essay?

You can technically write about anything, so long as it falls within one of the approved categories listed above.

It's best to choose a topic that matches one of the IB courses , (such as Theatre, Film, Spanish, French, Math, Biology, etc.), which shouldn't be difficult because there are so many class subjects.

Here is a range of sample topics with the attached extended essay:

  • Biology: The Effect of Age and Gender on the Photoreceptor Cells in the Human Retina
  • Chemistry: How Does Reflux Time Affect the Yield and Purity of Ethyl Aminobenzoate (Benzocaine), and How Effective is Recrystallisation as a Purification Technique for This Compound?
  • English: An Exploration of Jane Austen's Use of the Outdoors in Emma
  • Geography: The Effect of Location on the Educational Attainment of Indigenous Secondary Students in Queensland, Australia
  • Math: Alhazen's Billiard Problem
  • Visual Arts: Can Luc Tuymans Be Classified as a Political Painter?

You can see from how varied the topics are that you have a lot of freedom when it comes to picking a topic . So how do you pick when the options are limitless?

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How to Write a Stellar IB Extended Essay: 6 Essential Tips

Below are six key tips to keep in mind as you work on your Extended Essay for the IB DP. Follow these and you're sure to get an A!

#1: Write About Something You Enjoy

You can't expect to write a compelling essay if you're not a fan of the topic on which you're writing. For example, I just love British theatre and ended up writing my Extended Essay on a revolution in post-WWII British theatre. (Yes, I'm definitely a #TheatreNerd.)

I really encourage anyone who pursues an IB Diploma to take the Extended Essay seriously. I was fortunate enough to receive a full-tuition merit scholarship to USC's School of Dramatic Arts program. In my interview for the scholarship, I spoke passionately about my Extended Essay; thus, I genuinely think my Extended Essay helped me get my scholarship.

But how do you find a topic you're passionate about? Start by thinking about which classes you enjoy the most and why . Do you like math classes because you like to solve problems? Or do you enjoy English because you like to analyze literary texts?

Keep in mind that there's no right or wrong answer when it comes to choosing your Extended Essay topic. You're not more likely to get high marks because you're writing about science, just like you're not doomed to failure because you've chosen to tackle the social sciences. The quality of what you produce—not the field you choose to research within—will determine your grade.

Once you've figured out your category, you should brainstorm more specific topics by putting pen to paper . What was your favorite chapter you learned in that class? Was it astrophysics or mechanics? What did you like about that specific chapter? Is there something you want to learn more about? I recommend spending a few hours on this type of brainstorming.

One last note: if you're truly stumped on what to research, pick a topic that will help you in your future major or career . That way you can use your Extended Essay as a talking point in your college essays (and it will prepare you for your studies to come too!).

#2: Select a Topic That Is Neither Too Broad nor Too Narrow

There's a fine line between broad and narrow. You need to write about something specific, but not so specific that you can't write 4,000 words on it.

You can't write about WWII because that would be a book's worth of material. You also don't want to write about what type of soup prisoners of war received behind enemy lines, because you probably won’t be able to come up with 4,000 words of material about it. However, you could possibly write about how the conditions in German POW camps—and the rations provided—were directly affected by the Nazis' successes and failures on the front, including the use of captured factories and prison labor in Eastern Europe to increase production. WWII military history might be a little overdone, but you get my point.

If you're really stuck trying to pinpoint a not-too-broad-or-too-narrow topic, I suggest trying to brainstorm a topic that uses a comparison. Once you begin looking through the list of sample essays below, you'll notice that many use comparisons to formulate their main arguments.

I also used a comparison in my EE, contrasting Harold Pinter's Party Time with John Osborne's Look Back in Anger in order to show a transition in British theatre. Topics with comparisons of two to three plays, books, and so on tend to be the sweet spot. You can analyze each item and then compare them with one another after doing some in-depth analysis of each individually. The ways these items compare and contrast will end up forming the thesis of your essay!

When choosing a comparative topic, the key is that the comparison should be significant. I compared two plays to illustrate the transition in British theatre, but you could compare the ways different regional dialects affect people's job prospects or how different temperatures may or may not affect the mating patterns of lightning bugs. The point here is that comparisons not only help you limit your topic, but they also help you build your argument.

Comparisons are not the only way to get a grade-A EE, though. If after brainstorming, you pick a non-comparison-based topic and are still unsure whether your topic is too broad or narrow, spend about 30 minutes doing some basic research and see how much material is out there.

If there are more than 1,000 books, articles, or documentaries out there on that exact topic, it may be too broad. But if there are only two books that have any connection to your topic, it may be too narrow. If you're still unsure, ask your advisor—it's what they're there for! Speaking of advisors...

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Don't get stuck with a narrow topic!

#3: Choose an Advisor Who Is Familiar With Your Topic

If you're not certain of who you would like to be your advisor, create a list of your top three choices. Next, write down the pros and cons of each possibility (I know this sounds tedious, but it really helps!).

For example, Mr. Green is my favorite teacher and we get along really well, but he teaches English. For my EE, I want to conduct an experiment that compares the efficiency of American electric cars with foreign electric cars.

I had Ms. White a year ago. She teaches physics and enjoyed having me in her class. Unlike Mr. Green, Ms. White could help me design my experiment.

Based on my topic and what I need from my advisor, Ms. White would be a better fit for me than would Mr. Green (even though I like him a lot).

The moral of my story is this: do not just ask your favorite teacher to be your advisor . They might be a hindrance to you if they teach another subject. For example, I would not recommend asking your biology teacher to guide you in writing an English literature-based EE.

There can, of course, be exceptions to this rule. If you have a teacher who's passionate and knowledgeable about your topic (as my English teacher was about my theatre topic), you could ask that instructor. Consider all your options before you do this. There was no theatre teacher at my high school, so I couldn't find a theatre-specific advisor, but I chose the next best thing.

Before you approach a teacher to serve as your advisor, check with your high school to see what requirements they have for this process. Some IB high schools require your IB Extended Essay advisor to sign an Agreement Form , for instance.

Make sure that you ask your IB coordinator whether there is any required paperwork to fill out. If your school needs a specific form signed, bring it with you when you ask your teacher to be your EE advisor.

#4: Pick an Advisor Who Will Push You to Be Your Best

Some teachers might just take on students because they have to and aren't very passionate about reading drafts, only giving you minimal feedback. Choose a teacher who will take the time to read several drafts of your essay and give you extensive notes. I would not have gotten my A without being pushed to make my Extended Essay draft better.

Ask a teacher that you have experience with through class or an extracurricular activity. Do not ask a teacher that you have absolutely no connection to. If a teacher already knows you, that means they already know your strengths and weaknesses, so they know what to look for, where you need to improve, and how to encourage your best work.

Also, don't forget that your supervisor's assessment is part of your overall EE score . If you're meeting with someone who pushes you to do better—and you actually take their advice—they'll have more impressive things to say about you than a supervisor who doesn't know you well and isn't heavily involved in your research process.

Be aware that the IB only allows advisors to make suggestions and give constructive criticism. Your teacher cannot actually help you write your EE. The IB recommends that the supervisor spends approximately two to three hours in total with the candidate discussing the EE.

#5: Make Sure Your Essay Has a Clear Structure and Flow

The IB likes structure. Your EE needs a clear introduction (which should be one to two double-spaced pages), research question/focus (i.e., what you're investigating), a body, and a conclusion (about one double-spaced page). An essay with unclear organization will be graded poorly.

The body of your EE should make up the bulk of the essay. It should be about eight to 18 pages long (again, depending on your topic). Your body can be split into multiple parts. For example, if you were doing a comparison, you might have one third of your body as Novel A Analysis, another third as Novel B Analysis, and the final third as your comparison of Novels A and B.

If you're conducting an experiment or analyzing data, such as in this EE , your EE body should have a clear structure that aligns with the scientific method ; you should state the research question, discuss your method, present the data, analyze the data, explain any uncertainties, and draw a conclusion and/or evaluate the success of the experiment.

#6: Start Writing Sooner Rather Than Later!

You will not be able to crank out a 4,000-word essay in just a week and get an A on it. You'll be reading many, many articles (and, depending on your topic, possibly books and plays as well!). As such, it's imperative that you start your research as soon as possible.

Each school has a slightly different deadline for the Extended Essay. Some schools want them as soon as November of your senior year; others will take them as late as February. Your school will tell you what your deadline is. If they haven't mentioned it by February of your junior year, ask your IB coordinator about it.

Some high schools will provide you with a timeline of when you need to come up with a topic, when you need to meet with your advisor, and when certain drafts are due. Not all schools do this. Ask your IB coordinator if you are unsure whether you are on a specific timeline.

Below is my recommended EE timeline. While it's earlier than most schools, it'll save you a ton of heartache (trust me, I remember how hard this process was!):

  • January/February of Junior Year: Come up with your final research topic (or at least your top three options).
  • February of Junior Year: Approach a teacher about being your EE advisor. If they decline, keep asking others until you find one. See my notes above on how to pick an EE advisor.
  • April/May of Junior Year: Submit an outline of your EE and a bibliography of potential research sources (I recommend at least seven to 10) to your EE advisor. Meet with your EE advisor to discuss your outline.
  • Summer Between Junior and Senior Year: Complete your first full draft over the summer between your junior and senior year. I know, I know—no one wants to work during the summer, but trust me—this will save you so much stress come fall when you are busy with college applications and other internal assessments for your IB classes. You will want to have this first full draft done because you will want to complete a couple of draft cycles as you likely won't be able to get everything you want to say into 4,000 articulate words on the first attempt. Try to get this first draft into the best possible shape so you don't have to work on too many revisions during the school year on top of your homework, college applications, and extracurriculars.
  • August/September of Senior Year: Turn in your first draft of your EE to your advisor and receive feedback. Work on incorporating their feedback into your essay. If they have a lot of suggestions for improvement, ask if they will read one more draft before the final draft.
  • September/October of Senior Year: Submit the second draft of your EE to your advisor (if necessary) and look at their feedback. Work on creating the best possible final draft.
  • November-February of Senior Year: Schedule your viva voce. Submit two copies of your final draft to your school to be sent off to the IB. You likely will not get your grade until after you graduate.

Remember that in the middle of these milestones, you'll need to schedule two other reflection sessions with your advisor . (Your teachers will actually take notes on these sessions on a form like this one , which then gets submitted to the IB.)

I recommend doing them when you get feedback on your drafts, but these meetings will ultimately be up to your supervisor. Just don't forget to do them!

body-bird-worm-cc0-pixabay

The early bird DOES get the worm!

How Is the IB Extended Essay Graded?

Extended Essays are graded by examiners appointed by the IB on a scale of 0 to 34 . You'll be graded on five criteria, each with its own set of points. You can learn more about how EE scoring works by reading the IB guide to extended essays .

  • Criterion A: Focus and Method (6 points maximum)
  • Criterion B: Knowledge and Understanding (6 points maximum)
  • Criterion C: Critical Thinking (12 points maximum)
  • Criterion D: Presentation (4 points maximum)
  • Criterion E: Engagement (6 points maximum)

How well you do on each of these criteria will determine the final letter grade you get for your EE. You must earn at least a D to be eligible to receive your IB Diploma.

Although each criterion has a point value, the IB explicitly states that graders are not converting point totals into grades; instead, they're using qualitative grade descriptors to determine the final grade of your Extended Essay . Grade descriptors are on pages 102-103 of this document .

Here's a rough estimate of how these different point values translate to letter grades based on previous scoring methods for the EE. This is just an estimate —you should read and understand the grade descriptors so you know exactly what the scorers are looking for.

Here is the breakdown of EE scores (from the May 2021 bulletin):

How Does the Extended Essay Grade Affect Your IB Diploma?

The Extended Essay grade is combined with your TOK (Theory of Knowledge) grade to determine how many points you get toward your IB Diploma.

To learn about Theory of Knowledge or how many points you need to receive an IB Diploma, read our complete guide to the IB program and our guide to the IB Diploma requirements .

This diagram shows how the two scores are combined to determine how many points you receive for your IB diploma (3 being the most, 0 being the least). In order to get your IB Diploma, you have to earn 24 points across both categories (the TOK and EE). The highest score anyone can earn is 45 points.

body-theory-of-knowledge

Let's say you get an A on your EE and a B on TOK. You will get 3 points toward your Diploma. As of 2014, a student who scores an E on either the extended essay or TOK essay will not be eligible to receive an IB Diploma .

Prior to the class of 2010, a Diploma candidate could receive a failing grade in either the Extended Essay or Theory of Knowledge and still be awarded a Diploma, but this is no longer true.

Figuring out how you're assessed can be a little tricky. Luckily, the IB breaks everything down here in this document . (The assessment information begins on page 219.)

40+ Sample Extended Essays for the IB Diploma Programme

In case you want a little more guidance on how to get an A on your EE, here are over 40 excellent (grade A) sample extended essays for your reading pleasure. Essays are grouped by IB subject.

  • Business Management 1
  • Chemistry 1
  • Chemistry 2
  • Chemistry 3
  • Chemistry 4
  • Chemistry 5
  • Chemistry 6
  • Chemistry 7
  • Computer Science 1
  • Economics 1
  • Design Technology 1
  • Design Technology 2
  • Environmental Systems and Societies 1
  • Geography 1
  • Geography 2
  • Geography 3
  • Geography 4
  • Geography 5
  • Geography 6
  • Literature and Performance 1
  • Mathematics 1
  • Mathematics 2
  • Mathematics 3
  • Mathematics 4
  • Mathematics 5
  • Philosophy 1
  • Philosophy 2
  • Philosophy 3
  • Philosophy 4
  • Philosophy 5
  • Psychology 1
  • Psychology 2
  • Psychology 3
  • Psychology 4
  • Psychology 5
  • Social and Cultural Anthropology 1
  • Social and Cultural Anthropology 2
  • Social and Cultural Anthropology 3
  • Sports, Exercise and Health Science 1
  • Sports, Exercise and Health Science 2
  • Visual Arts 1
  • Visual Arts 2
  • Visual Arts 3
  • Visual Arts 4
  • Visual Arts 5
  • World Religion 1
  • World Religion 2
  • World Religion 3

body-whats-next-stars

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70 IB Biology IA Ideas

Welcome to our blog post on IB Biology Internal Assessment (IA) ideas!

If you're an IB Biology student, you know that the IA is a crucial part of your coursework and can make or break your final grade.

But coming up with a research question can be a daunting task.

That's why we've compiled a list of 70 potential IA ideas for you to choose from.

Whether you're interested in studying photosynthesis, enzymes, or biodiversity, we've got you covered.

It's important to note that these ideas should be used as a starting point and not as a definitive answer. You may find some of these ideas are not feasible or may not align with the scientific method. However, they should give you a good idea of what topics to consider for your IA.

But that's not all... Once you've chosen your research question, Prodigy Prompt can help you generate example sections of your report that are tailored to your chosen topic.

This way, you can be sure that your IA report is well-structured, evidence-based, and meets all the requirements of the IB Biology syllabus.

So, without further ado,👇 let's dive into our list of 70 IA ideas👇

We hope that you'll find something that piques your interest.

How does the pH level of water affect the growth and survival of microorganisms?

How does the release of betacyanin due to beet cell membrane damage affect the color of biological membranes as measured by a spectrovis?

How does the intensity of light affect the growth and development of a plant species?

How does the type of soil affect the growth and development of microorganisms?

How does the water level affect the growth and development of aquatic plants?

How does the sunlight variation of milk affect the rate of bacterial growth?

How does sudden exercise affect heart rate and baroreceptor feedback?

How do the respiration rates of baker's yeast and lager and wine yeast in various sugar solutions compare?

How does the water level affect the growth and survival of fish?

How does the pH level of water affect the rate of photosynthesis in a plant species?

How is the primary structure of amylases related to pH buffers?

How does temperature affect transpiration rates in a plant species?

How does temperature algae concentration other aquatic plants turbidity salinity and nutrient levels affect the primary productivity of algae samples?

How does the distance from a light source affect photosynthetic activity in a plant species?

How does the intensity of light affect the rate of respiration in a plant species?

How do the buffering actions of various substances such as antacids milk sodium bicarbonate sodium carbonate and detergents compare?

How does the temperature of water affect the metabolism of fish?

How does the concentration of sucrose affect the respiration rate of yeast?

How does temperature affect the rate of transpiration of Halophytes or Xerophytes?

How does the presence of chemical industries/sewage treatment plants affect the Water Quality Index (WQI)?

How does the temperature of milk affect the rate of bacterial growth?

How does the type of fertilizer used affect the growth and survival of a microorganism?

How do different salts affect the rate of decay (measured by the pH) of vegetables?

How does muscle activity change when standing on one's toes (as in ballet dancers)?

How do different antibiotics affect the rate of germination of seeds?

How do different carbohydrates in edibles affect blood sugar levels in humans?

How does age affect the accuracy of an eye test?

How does a particular abiotic factor affect biodiversity in a habitat?

How does the use of Nitrogen or Fluoride based fertilizers affect the height of plants?

How does mitosis in Onion (Allium cepa) / Garlic (Allium sativum) affect the mitotic index?

How does the pH level of water affect the growth and survival of a plant species?

How do Carbon Dioxide levels in exhaled air before and after exercise sessions compare?

How does salinity affect the growth and survival of marine organisms?

How does temperature affect the rate of fermentation in yeast?

How does the intensity of light affect the rate of photosynthesis in algae?

How does the pH level of water affect the activity of enzymes in a plant species?

How do the absorption spectra of different grades of olive oil compare?

How does the concentration of sodium chloride ions affect the rate at which enzyme ∝-amylase hydrolyzes starch as measured by a spectrophotometer?

How does the type of soil affect the growth and development of a plant species?

How is the incidence of tuberculosis related to a country's Human Development Index (HDI) level?

How does the level of light affect the predation of a particular insect?

How does temperature affect the chemical properties of pH and mineral properties of phosphorus potassium and nitrogen content in a particular variety of soil?

How does the interaction of the Lactase enzyme with Lactose in Lactaid pills (Lactose Intolerance pills) affect lactose digestion?

How does the intensity of light affect the growth and survival of a fungus?

How do Gersmehl diagrams from different biomes or in different real-world conditions differ in terms of nutrient sinks such as biomass litter or soil?

How does the temperature of water affect the respiration rate of fish?

How does pollution affect the biodiversity of a local ecosystem?

How does the exposure of a plant species to sunlight affect the concentration of RuBisCo in its leaves?

How does the intensity of light affect the photosynthetic rate of a plant species?

How does the pH level of water affect the growth and survival of algae?

How does the pH level of water affect the rate of transpiration in a plant species?

How does the water level affect the growth and survival of aquatic plants?

How does age affect human reaction times?

How does the temperature of water affect the metabolism of aquatic plants?

How does the pH level of water affect the growth and survival of bacteria?

How does the quality of light affect the rate of photosynthesis in a Tomato plant (Solanum lycopersicum)?

How does the type of fertilizer used affect the growth and development of a plant species?

How does the type of soil affect the growth and survival of microorganisms?How does the oxygen availability affect the ethylene levels released on the decay of fruit?

How does the method of fruit ripening affect the metabolism of starch to glucose in a plant species?

How does the type of toothpaste affect the success of bacterial growth?

How does the type of fertilizer used affect the growth and survival of a plant species?

How do enzymes affect cheese production?

How does the intensity of light affect the growth and development of a fungus?

How does age affect the visibility of root hair cells?

How does the intensity of light affect the growth and survival of a microorganism?

How does time affect the plasmolysis of potatoes?

How does the wavelength of light affect the degree of growth of a plant towards a light source?

How does the use of antibiotics affect the growth of bacteria/microorganisms?

How does increasing the duration of UV-B irradiation affect the success of Vigna radiatia germination?

How does the concentration of Nickel (II) Chloride affect the germination rate of Triticum aestivum seeds?

12 Examples and Tips for IB Biology IA

May 4, 2022 | IB subjects

ib biology ia essay examples

IA is one of the many things IB students struggle with, but some might feel that writing the IA in Biology is especially confusing since it covers broad topics. This post is for those who are having a hard time coming up with a topic, are worried about writing the IA in Biology overall, or are interested in Biology but not so sure about taking it because of IA. An overview of the subject IB Biology can also be seen in a previous post: Exam Strategy for IB Biology (HL/SL) .

1. Overview of Biology IA

Both HL and SL students are expected to write an IA ( Internal Assessment ) in Biology which accounts for 20% of the final grade . The IA in biology is expected to be a 6-12 pages long report about an investigation a student carries out based on their own hypothesis.

1.1 IA Criteria

HL and SL share the same IA criteria and it’s important to understand the criteria before and while carrying out the investigation for your IA. (Reference: Biology Teacher Support Material )

2. Examples of Biology IA Topics

Many IB graduates have kindly answered an online survey by MakeSensei and given examples of IA topics in IB Biology. Some of them are RQs (Research Questions), so you might want to see the pattern of how they make RQs for your future IA.

  • What is the effect of exposure to different concentration of sodium chloride solutions for different duration time on the germination percentage, mean germination time, and relative injury rate of Ipomoea aquatica?
  • Lactic acid experiment in milk
  • What is the effect of sodium chloride concentration (0.0, 0.4, 0.8, 1.2, 1.6, and 2.0 %) on the rate of hydrolysis of 1.0 % starch solution by 2.0 % ɑ-amylase (Bacillus subtilis), measured as the rate of decrease in absorbance value (Au s–1), using Spectrophotometer Vis at 434.2nm?
  • Protein-digestive enzyme
  • What is the effect of fertiliser quantity on evening levels of dissolved oxygen in river water samples over a period of two weeks?
  • An Investigation into the Effect of Different Types and Concentrations of Pesticides (Orthoran Acephate, Kadan Safe, Kadan Plus DX) on Seed Germination: Observing Plant Growth of ErucaSativa, Brassica Oleracea, Lepidium Sativum and Perilla Frutescens
  • An investigation into the effect of sodium chloride on plant germination and its growth.
  • (Title: How to make delicious natto) RQ: What is the effect of pre-soaking time of soybeans, 0.00, 3.00, 6.00, 9.00, and 12.00 hours (±0.05 hours), on the length of threads between separated fermented soybeans (natto) measured by a clear plastic ruler (±0.1cm)?
  • Effect of light intensity on the travel activity of a Physella acuta
  • Investigating the effect of concentration of the salt solution on germination and growth of cotton and spinach seeds
  • Investigating the correlation of the length of knee roots of a mangrove and the number of holes crabs make in the given area
  • Effect of temperature on denaturation of albumin protein

3. Tips for Biology IA

3.1 Set Appropriate Independent/Dependent Variables

In order to carry out the investigation with sufficient sample size and trials, there needs to be independent and dependent variables that are both appropriate in terms of the purpose of your investigation. If you want to find out the relationship between X and Y (how X influences Y), then your independent variable should be X and your dependent variable should be Y. Both variables should be measurable , meaning quantitative, to allow various statistical analyses. But having qualitative data is valued in discussion as well.

3.2 The More Data, The Better

It is known that you should have at least 25 samples of data for your Biology IA, but let us explain why. While having multiple trials is necessary for the investigation, each trial should also have multiple samples. Therefore, 5 trials with 5 samples each make up 25 samples in total. Having said that, your sample size is up to you, and having more than 25 samples would only make your data more robust . But make sure you have enough time and energy to process the whole data.

3.3 Use Appropriate Secondary Sources

Doing background research on the field you’re focusing on in IA is required to back up your hypothesis, discussion, and conclusion. A lot of people use secondary sources (sources that are not first-hand) and most often through the internet. But, using Wikipedia or personal blogs would not be appropriate for your IA because they may not be reliable, accurate information. Instead, you might want to use these websites to search for previous academic articles and journals.

  • Google Scholar
  • The World Factbook  (provides you data about the country of your interest)

3.4 Don’t Forget Annotations and Citations

  • Annotations

An annotation is a short comment written near an image to give an explanation. Annotations are necessary when the image and its title don’t give enough explanation to specific objects in the image and your word count is limited. For example, when you’re showing your method with an image of instruments, readers might not understand why you chose those instruments to carry out your experiment. To avoid such inconvenience, annotations provide more detailed information than the title and the main text.

A citation is a short version of the reference to your source and it needs to be in-text or footnote. Every time you mention something that is not original or first-hand, you need to put citation(s) to prove where that statement comes from. If you miss citations, it will be considered plagiarism and you could fail the IB. Therefore, citations are important!! You could use  Citation Machine  to create a reference list and citation for each reference (check which style is preferred by your teacher).

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  • 30 investigation ideas for Biology IA
  • The Investigation

ib biology ia essay examples

Of course the ideas are just ideas, nothing is specified and all the details will need to be explored and evaluated by students during their investigations.

Testing the effectiveness of different types of toothpaste.

Toothpaste is labelled according to how natural or how chemical the contents are.  This study could be an investigation of how effectively the toothpaste inhibits the growth of bacteria according to the scale of the chemicals in the toothbrush. A challenge is to work out the biological reasons behind you hypothesis, and it may be a good idea to branch away from toothpaste to test a specific chemical from the ingredients in the toothpaste.

Testing spoilage of milk in different conditions.

Lactobacilli reproduction and growth is the cause of milk spoilage.  What effect do conditions, such as temperature, sunlight have on the rate of spoilage.  This is a nice wet laboratory project and there are some simple ways to measure the growth of the bacteria but these can be fiddly to work out, and concentrations of bacteria used in inoculations will need working out.

Tomato online simulation photosynthesis lab (Leaf lab)

Using LeafLab - plant physiology/photosynthesis to test the effectiveness of different colours of light on the photosynthesis rate of tomato plants.  The data collection using the online lab may be easy enough, but the challenge is going to be designing a meaningful experiment and collecting enough results to complete the analysis well.

Investigation of Age and reaction speed

This is an investigation to test a hypothesis that reaction time wll slow down with age.  By testing people of different ages to see if there is a difference in their reaction time it may seem like a simple study, but there are a lot of factors which need to be controlled and it will be difficult to find enough participants to create a large enough data set.  There are also many factors to consider in the type of reaction speed test that is used and there are also problems associated with the learning of the skill during the experiment.

Examining the relationship between cases of a disease and weather patterns.

This investigation tries to establish a pattern between the weather and the spread of a disease. Using nationally published data on epidemiology and weather data is certainly possible and it could happen that there are correlations between climate and some disease outbreaks this will need explaining in terms of the mechanisms of transmission of the specific disease.  Some diseases spread through direct contact, others are transmitted by an insect vector.

Testing the accuracy of colour vision using online colour tests

There are some quite nice online tests of colour vision, and also many telephone apps.  This investigation is Design an experiment to investigate a factor which affects the precision of colour vision, age, tiredness, gender, eye colour, etc. http://www.xrite.com/online-color-test-challenge.

Flowering stages of a plant at different altitudes

The climate is different at different altitudes and the growing season begins later at high altitude. This investigation relies on the recording of abiotic data and data about the stage of the flowering cycle using the number of flowers / fruit / buds etc in a single species at different altitudes up a mountain.  Of course there will be other factors to consider, for example local feature of the habitat where the plants are growing and the aspect of the flowers' location, not to mention grazing and grass cutting.

The effect of river pollution on the presence of a single species

It is quite easy to record the number of individual plants / animals of a single species in a river at different distances above and below a possible source of pollution. If some abiotic factors can also be recorded including the pollution level, eg nitrate level, BOD, turbidity etc. then this could be a very good study.

The effects of antiseptics on the germination of seeds or the growth of plants -

This looks like an interesting topic of study.  Many methods are possible, and there has been some very recent research suggesting that antiseptics can affect the germination of seeds or the growth of plants.

Reference: Gilbert GS, Diaz A, Bregoff HA. Seed Disinfestation Practices to Control Seed-Borne Fungi and Bacteria in Home Production of Sprouts. Foods . 2023; 12(4):747. https://doi.org/10.3390/foods12040747

Do plants grow faster in soil which has more microbial activity (respiration)

This investigation  could be a nice way to combine two standard procedures, one to estimate the rate of respiration in the soil and another to estimate the rate of growth of a plant. Soil respiration can be measured using a CO 2 probe and a data logger the same equipment could be used to measure the rate of photosynthesis, although growth (or photosynthesis) can be measured in other ways too. There are lots of practical problems to overcome, most importantly how to change the soil so that it has different amounts of respiration. One idea would be to make a series of soils using active compost and sand.  it might even be possible to use mesocosms to perform this investigation as these would make it easier to control more of the other variables.

The effect of pets on the diversity of plants in a garden lawn.

This is a nice idea for an investigation into the number of species found in a garden in houses where there are pets and no pets.  Ecological techniques and quadrat sampling could be used together with mapping of digging or scratching to establish whether the presence of a pet increases plant diversity or not.  There are many possible variations, perhaps the presence of animal excrement could be the causal factor, otherwise some species may be more resistant to scratching and disturbance, caged animals can selectively graze on parts of a lawn, just to mention a few ideas.

The effect of temperature / light on the ripening of fruit, e.g. bananas, cherries, tomatoes.

The challenge is really how to control the temperature of the fruit (or the light) for a long period of time, perhaps 2 weeks. Another difficulty will be to devise a way to measure the extent of fruit ripening, or softness. Bananas lend themselves to this because their skin changes colour. Of course the underlying processes are controlled by enzymes, or the fruit ripening hormone ether.

What is the difference in the CO 2 levels in exhaled air before and after exercise?

This investigation might sound simple at a first glance but there are many difficulties to overcome in terms of controlled variables and the method of measuring the CO 2 . This might involve the use of a data logger, or perhaps a titration using bromothymol blue.  The release of CO2 by the body in the lungs is not simple either, factors to consider include the relative amounts of aerobic and anaerobic respiration, as well as the position of the muscles being exercised.  Perhaps the muscles with a greater blood flow will cause a different effect to those in the bodies extremities, and what effect could warming up have on the process?

How does a specific abiotic factor affect biodiversity in a habitat?

This is nice project if there is a specific environmental gradient in the site being investigated.  The use of a transect of transects will be useful for the sampling. The challenge is to explain why there might be a change using biology and then to test it using some type of ecological sampling.  Ensuring that there is enough data will also be important as there are likely to be quite a few other factors which will need controlling or considering at least.

The effect of a short burst of exercise on blood pressure or two groups of people.

This is a simple experiment to carry out, but a difficult experiment to get good controlled data for.  There needs to be some clear links to the biology of blood pressure and how exercise affects it. A clear RQ is essential and there are quite a few possibilities.  Controlling factors which can affect blood pressure could be an investigation in itself!  Of course the IB guidelines on experimentation needs to be followed and written consent sought for participants.

The effect of a warm up on the maximum heart rate (or maximum speed) achieved in a standard test

The role of a warm up in sport is clear. Athletes perform better if they warm up properly before an event.  Is there an optimum intensity of warm up to achieve best performance?  Can the max performance be measured best using max heart rate or maximum speed? These are just some of the questions which will need answering.

The effect of isotonic drinks on rehydration and recovery after exercise

The problem of this investigation is that it is difficult to measure rehydration or salinity.  At the end of a long endurance event cramps and muscle fatigue will be evident but this is not possible to recreate in the lab in school.  Perhaps some form of experiment using isotonic solutions on slightly dehydrated muscle tissue from a chicken leg, or liver would work. This would be a challenge and it would require some research before beginning.  Avoid any investigation where you are getting friends to drink Gatorade and measuring some unrelated but easy to measure factor, like pulse rate.

The effect of different colours of light on the growth of seedlings

This is an interesting study and it links to the role of auxin as well as photosynthesis so there is theory to discuss.  Practical procedures and controls will be the challenge, but data should be easy to record if the seedlings grow.  Some preparation time will be required to germinate and plant the seeds.

The effect of salt on the germination of seeds.

This is an interesting topic of investigation which relates to osmosis and ecology.  Some plants grow well in coastal soils with igh salt concentrations but others don't. The practical methods to germinate seeds and select appropriate salt concentrations will present definite challenges but this is an interesting study for students living near the coast, or in places where salt is applied to the roads in winter.

Examining the effect of plants on the solutes in the runoff from soils

While there is a considerable challenge in designing apparatus and growing plants the idea of using plants to filter the water in 'ecological' swimming pools is quite well established. There may be a combination of roles for plant roots and bacteria in the substrate and both of these link to the nitrogen cycle and so would allow for a detailed hypothesis and a focused research question.

Examining the glucose concentration in something

using potassium permanganate and heating, from a protocol from Science & plants for schools. This is an interesting quantitative method to estimate glucose concentration.  It could be used in a wide range of labs.  Lots of plant ideas in the questions and answers  It is also possible to use this method to study glucose levels in ripening fruit, lactase activity in milk producing glucose or maltase activity in germinating seeds.

Examining a factor which affects vital capacity, or tidal capacity of the lungs.

The greatest challenge in this investigation is getting a large enough data set which takes into consideration enough of the factors which need to be controlled. Comparing boys and girls for example will be impossible, unless the sample size is very large.  One possible solution is to measure another (or some other) factors about the body and look for a correlation. One nice idea might be to see if the growth in the lungs' vital capacity correlates better with the circumference of the skull or the length of the legs in children of different ages.  Biological explanations could look at the way we grow, and if the brain changes size at the same rate as the lungs. It may even be possible to find a database of measurements of children of different ages. There are some ethical questions involved too, and parental consent will be essential for any experiments on children.

The effect of soil pH on the germination of seeds

This is a simple idea, but the explanation is more complex, and this might be the challenge of this particular investigation.  Would soil pH effect the enzymes in the seed responsible for germination, is there another explanation?  Controlling other factors which affect germination and collecting a large enough data set will also be good challenges for a Biology student to work out.

Investigation of the functioning of the eyes when using paper or different electronic screens

First is to ensure that there is some biology to explain any hypothesis, and that the RQ is firmly focused in the Biology. Then is is going to be a challenge to design a method of data collection which controls all the possible variables. Some independent variables will be easier to test than others, for example size of text and distance wt which it can be read, would be better than measuring reading speed which can be affected by many other variables.

Examining the effect of household cleaning products on the growth of house plants

This could be a difficult investigation to do quantitatively unless there was a longer time period available to observe growth.  There could be some biology theory applied to the plants leaves, or roots.  Processes such as diffusion and osmosis as well as the effect of chemicals on components of cell membranes, or on enzymes could be included in the theory. Some of the challenges of this type of investigation will be controlling other factors which affect the growth of plants. One option might be to test the chemicals on small aquatic plants, or germinating seedlings, but there are challenges to overcome here too.

Using published epidemiological data to examine a link between an illness and a specific factor.

Here the challenge is the exploration section. You have to show that the data has been carefully selected, and that measures have been taken to ensure that other factors which might affect the data have been controlled, by careful selection of the data used. Some assessment of the reliability of the sources will be needed and some discussion of ethics of using someone's data, with their consent, hopefully.  The best investigations will have a biological reason why there might be a correlation between the IV and the DV.  The data must be analysed by the student and tables / graphs etc. should include all the normal conventions of d.p. and uncertainties.

Investigation of the effects of natural selection related to colour markings of a single species of animal or plant

This is a great idea, but it could be complex and time consuming depending on the lab.  There are some online simulations but these can only be used in conjunction with some other analysis; never just present the online lab as an investigation on it's own. Other possibilities are paper simulations, e.g. with peppered moth types.  Practical work could look at the density of aphids on leaves of different shades, or bumble bee feeding on flowers of different shapes or predator prey interactions etc.  Lots of scope but not an easy investigation to complete in the time, in 12 pages.

Investigation into the effect of regular exercise on the increase in pulse rate after a short period of exercise.

This is a bit more complex than a simple pulse rate investigation, but the challenge to control variables is equally great.  If a person exercises regularly they should have a better level of fitness, this might mean that their heart rate increases by less in the short burst of exercise than someone who does no regular exercise.

Investigation of the properties of photosynthetic pigments using different solvent mixes and rf values.

This investigation is a bit biochemical and the answer to simple research questions about the hydrophobic / hydrophyllic properties of photosynthetic pigments themselves would be a little bit obvious, so the challenge is to thing of a research question that could be answered by mixing petroleum ether (a nonpolar solvent) and propanone (a polar solvent) in different proportions and calculating retention factors.  Some suggestions of research questions may be; Is there a difference in the composition of photosynthetic pigments in the leaves of a plant found in the sun or the shade? Which pigments are made first in a growing leaf, or are all the pigments made at the same time? How does the shade of a leaf relate to the composition of photosynthetic pigments it contains?

Investigation of the behaviour of two groups of animals, or several groups of animals in a range of conditions.

This investigation is going to require a very precise research question and some careful methodology to ensure that the data collected can be used to answer the RQ.  However it could be really interesting to compare simple behaviour in animals.  Does the behaviour of an animal change as the population increases? Do individuals of different types all behave in the same way to a stimulus.

Investigation of SA:vol on the rate of diffusion

This is a standard lab and the challenge will be to ensure that it is put into an interesting biological context. Starting with a process which requires diffusion in living cells will help the topic to be interesting and will show some personal engagement. The analysis of the results and the design of the method is another place where PE can be demonstrated, try to take the standard lab and adapt it so show something which is not 'standard'. 

Investigating the effect of sucrose concentration of the rate of respiration in yeast.

This is interesting because the higher concentrations will cause outward osmosis in the yeast and perhaps slow down respiration, or even kill the yeast. Lower concentrations will slow respiration because of a lack of substrate.  The challenge will be in deciding which concentrations to test and in explaining the results.

The effect of exam conditions on a physiological feature of the body.

In this investigation a change in a physiological feature is explored. There are plenty of factors to control which makes this investigation difficult and if there isn't enough data or the controls are not in place this could lead to a low mark after much work.  The choice of physiological features of the body could include heart rate, or pupil size, or skin redness. Measuring theses factors might be tricky and will involve some testing, although using a phone camera or a video camera could help. It is possible to establish a theoretical link between mild stress and adrenaline (epinephrine) which will affect features in the body including pupil size but it is not possible to directly measure the level of any hormones in the body.  Remember any participants will need to give written consent before any experimenting, and the mild stress of exam conditions must be harmless.

Investigations to avoid !

Every year the examiners' report mentions problematic Investigations, those which are unethical, or standard labs which are not applied to any specific interest.  The following examples are not unethical, but just not very good, because the data is rarely enough for a good analysis and difficult to control.

Investigation of the effect of music on the heart rate.

Don't do it! This sounds like an easy investigation but it is tricky because first there needs to be some biological reason why the heart should speed up in the presence of music and this is impossible to explain with IB Biology. Perhaps another research question will be better, something linked to hormones, or to physical activity.  If you insist on trying this then be sure to cover the control of variables, there are a lot which can affect the heart. Perhaps one of these other variables will be a better variable to investigate instead of music. If you are still not dissuaded then be sure to collect enough data and try to be analytical, don't mix types of music and tempos of music and try to keep the investigation to some biological cause or effect. The IB advise student and teachers, each year, to avoid this sort of lab.

The effect of reading different genres of literature on blood pressure and pulse rate.

Avoid this type of investigation, .  While it is an interesting idea, like the example above there are many factors to control in this investigation, which is an interesting modification of a standard lab looking at exercise.  The difficulty begins with identifying the genres in a scientific way. The biological explanation of why blood pressure might change when reading may be tenuous. This could be compared to listening to music where research has been done to establish that pulse rate can be affected by music.

External Online Labs - Ideas and links

This is a list of possible sites for students to use as online labs. 

Sometimes sites go ofline or change their address.

Pease comment on broken links and suggest alternative ideas in the comments.

Biology Labs Online have the potential for making biology education more interactive, effective, and fun! Biology Labs Online is a collaboration between the California State University system and Pearson, Inc. You can access these here https://sciencecourseware.org/BiologyLabsOnline/   (Thanks to Sarah Kelley for the link)

Lab bench fly breeding lab Breeding Drosophila, fruit flies

Natural selection - lab bench  Which type of water fleas escape predators best?

Human benchmark lab - Quite a nice small set of tests, including reaction times

Mean arterial pressure calculator online - a useful little calculator

Sciencelab Chemical data sheets MSDS (Materials Safety data sheets) - useful for risk assessments

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Biology IA Topics: 20+ Great Ideas to Get You Started

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by  Antony W

September 5, 2022

biology IA topics

There’s nothing worse than trying to brainstorm and search for Biology IA topics only to come out empty.

The problem is:

There’s a lot to explore in Biology that it proves challenging to determine what topic would be suitable to investigate from the hundreds of possible options. So if you’re having a difficult time figuring out what topic to explore, we can understand.

In this post, we’ll share a list of the best IB Biology IA topics that you can use either for inspiration to help you come up with a topic of your own or as a modified topic for further research.

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IB Biology Internal Assessment (IA) Topics

Coming up with an IB Biology IA topic to explore isn’t difficult if you understand the requirements. Like Physics and Chemistry ,  your IA in Biology must focus on scientific writing and research in the Biology subject.

Below is a list of 30+ topic ideas for Biology Internal Assessment:

  • Assessment of the effect of temperature on the vitamin C content of various juices
  • What effect can quick shifts in body posture have on baroreceptor feedback and pulse rate?
  • How do detergents, drinks, yogurt, and milk stack up when it comes to buffering?
  • How does the ideal pH affect the growth rate of pinto and green beans? Proven Through Experiment
  • The temperature dependence of the activation energy released during the decomposition of H2O2 utilizing the catalase enzyme and aluminum inhibitor as catalysts.
  • To what extent does organic household waste affect the germination and emergence of tomato seeds?
  • Investigating the Role of Carbonated Drink Volume and pH in Tooth Erosion/Decay
  • In vitro Studies of Aluminum Chloride's Effects on the Liver Catalase Enzyme's Degradation of Hydrogen Peroxide
  • Changes in seashell mass and carbon monoxide (CO) emitted during the reaction as a function of HCL concentration
  • Does river pollution threaten the source of water for marine life?
  • Fruit ripening as influenced by environmental factors including light and temperature
  • How can we evaluate the respiration rates of wine yeast and baker's yeast in various sugar solutions?
  • What happens to DNA movement as the concentration of the agarose gel changes?
  • Compare the top and bottom 25 nations in terms of HDI and their rates of lung cancer-related mortality using secondary data.
  • How does body mass index (BMI) affect the skin's surface temperature and the pace at which it recovers after exposure to cold?
  • Hydrogen peroxide breakdown rate influenced by presence of various metal ions (H,O.).
  • Using the Silver Nitrate titration method, how much variation exists between the chlorine concentrations (mg / L) of several locally accessible brands of treated water?
  • How post-workout use of energy drinks affects cardiovascular function and blood pressure
  • How do energy drinks affect blood pressure and heart rate following exercise?
  • How do varying amounts of lactases affect the efficiency with which lactose and other disaccharides in milk are digested?
  • Is there a correlation between the presence of home furnishings and stunted plant development?
  • In terms of the pace of hydrochloric acid neutralization, as assessed by the difference in change in pH levels in 5 minutes, how do cumin and turmeric powder compare to indigestion tablets?
  • What effect does zinc chloride concentration have on plaque development?
  • What happens to the length of Citrus limon roots as the Oxytetracycline concentration is raised from 5 mg/L to 10 mg/L?
  • Is there a correlation between the pH of spoiled milk and the temperature at which it was stored?
  • How can the opposing effects of temperature and light intensity on the time it takes for photosynthesis to occur cancel each other out?
  • How can the acidity of certain drinks contribute to tooth decay?
  • What happens to your heart rate if you suddenly start working out hard, and how much of an effect does warming up have on your maximum heart rate
  • How effective are natural antiseptics such as ginger and turmeric compared to store-bought alternatives?
  • How potent are synthetic antibacterial treatments in comparison to natural antibacterial remedies?
  • What effect does sodium chloride have on bougainvillea seed germination at various concentrations?
  • What effect does soil composition have on the propagation of a plant's offshoots?
  • How much does the amount of sodium nitrate powder used to preserve meat reduce its quality?
  • For what reason does moringa seed and leaf extract (herbal medication) inhibit the growth of dandruff-causing Malassezia yeast (Pittosporum)?
  • Which laundry detergent is best in breaking down lipids and getting rid of stains?
  • When it comes to radishes, how does the salinity of the water effect their development rate?
  • Does Gibberellic acid influence dolly Parton rose germination, and how does it react at various concentrations?

Assessed internally and moderated externally by the IB, Biology IA at SL and HL accounts for 25% and 20% of the final grades respectively. Your teacher will assess your work out of 24 based on well-defined assessment criteria. As such, you should work on a topic that you can explore comprehensively within the scope of the assignment.

Final Thoughts

The IB Biology IA assignment isn’t as lengthy as the extended essay in the same subject, but it can be quite involving. You’ll conduct extensive experiments and the writing process is going to be somewhat longer.

To have an easy time working on the subject, it’s best to choose a topic that interests you, so you can focus on an area that you’ve always wanted to explore.

Given that we’ve shared over30 topic ideas with you, you shouldn’t have a difficult time figuring out what to work on.

About the author 

Antony W is a professional writer and coach at Help for Assessment. He spends countless hours every day researching and writing great content filled with expert advice on how to write engaging essays, research papers, and assignments.

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  • Biology IA topics

Biology Internal Assessment is a crucial component of the International Baccalaureate Biology course, and it requires students to conduct independent research on a topic of their choice. This task aims to assess students’ understanding of scientific research and their ability to apply scientific concepts and principles to a real-world problem. In this article, we will explore some Biology IA topics that students can consider and provide some tips on how to choose the best topic for their research.

Biology IA topics

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Tips for Choosing a Biology IA Topic

Choosing a topic for your Biology IA can be a daunting task, but it can also be an exciting opportunity to explore a topic that you are passionate about. By following a few tips, you can select a topic that aligns with your interests and capabilities.

First and foremost, consider your interests when selecting a topic. Think about the aspects of biology that you find most interesting, whether it be human health, genetics, ecology, or biotechnology. By choosing a topic that you are passionate about, you are more likely to be motivated and engaged throughout the research process.

Additionally, it is important to consider your strengths when selecting a topic. Perhaps you excel in data analysis, writing, or conducting experiments. By selecting a topic that aligns with your strengths, you can leverage your skills to conduct high-quality research.

Another important factor to consider is feasibility. The topic you select should be feasible and manageable within the given time frame. It is essential to choose a topic that is specific, clear, and well-defined, which will make the research process more manageable. Additionally, the topic should be practical and achievable with the resources available, including time, equipment, and financial resources.

Consider the resources that you have access to when selecting a topic. This includes laboratory equipment, literature, and financial resources. If you are conducting an experiment, it is important to ensure that you have access to the necessary equipment and materials. If you are conducting a literature review, ensure that you have access to relevant scientific articles and journals. Furthermore, consider the cost of conducting research and ensure that you have access to the necessary financial resources.

Finally, when selecting a topic, consider the research questions that you will be investigating. A good research question is one that is specific, testable, and relevant. A good research question will allow you to conduct a study that is feasible and manageable, while also providing interesting and insightful results.

Examples of good research questions include those that involve a comparison, a cause and effect relationship, or a prediction. A comparison question might investigate the differences between two groups or conditions, such as “What is the effect of different types of fertilizer on plant growth?” A cause and effect question might investigate the relationship between two variables, such as “What is the effect of temperature on the metabolic rate of insects?” A prediction question might investigate the potential outcomes of an intervention or change, such as “What is the effect of a new drug on the progression of a disease?”

List of Biology IA Topic Ideas

When it comes to selecting a topic for your Biology IA , the possibilities are endless. If you are struggling to come up with a topic, here are some examples of potential Biology IA topics that you can consider based on your interests and strengths.

Topics related to human health and disease

If you are interested in human biology, you may want to consider investigating the effect of different diets on blood sugar levels. You can compare the effects of high-sugar, low-sugar, and low-carbohydrate diets on blood glucose levels. Alternatively, you can investigate the effectiveness of natural remedies on curing acne. There are several natural remedies that are believed to be effective in treating acne, such as tea tree oil, honey, and aloe vera. You can compare the effects of these remedies with over-the-counter acne treatments. Another topic to consider is the impact of exercise on heart rate and blood pressure. You can investigate the effects of different types of exercise on heart rate and blood pressure, such as aerobic exercise, weight training, and yoga.

Topics related to genetics and evolution

If you are interested in genetics and evolution, you may want to investigate the inheritance of traits in fruit flies. Fruit flies are commonly used in genetics research since they have a short lifespan and reproduce quickly. You can investigate the inheritance patterns of different traits, such as eye color or wing shape. Alternatively, you can investigate the genetic basis of inherited diseases. There are several inherited diseases that are caused by mutations in specific genes, such as cystic fibrosis or sickle cell anemia. You can investigate the effects of these mutations on the body and potential treatments. Another topic to consider is the impact of environmental factors on the expression of genes. You can investigate the effects of different environmental factors, such as temperature or light, on the expression of genes.

Topics related to ecology and the environment

If you are interested in ecology and the environment, you may want to investigate the impact of pollution on plant growth. You can expose plants to different levels of pollution, such as air pollution or water pollution, and measure the effects on plant growth. Alternatively, you can investigate the effect of different soil types on plant growth. Different types of soil have different nutrient levels, water retention, and pH levels, which can affect plant growth. Another topic to consider is investigating the impact of light pollution on animal behavior. Light pollution can disrupt animal behavior, including sleep patterns, foraging, and mating.

Topics related to biochemistry and biotechnology

If you are interested in biochemistry and biotechnology, you may want to investigate the effectiveness of antibiotics on different strains of bacteria. Antibiotic resistance is a growing concern, and it is important to investigate the effectiveness of different antibiotics on different strains of bacteria. Alternatively, you can investigate the effect of different concentrations of enzymes on the rate of reaction. Enzymes are critical in biological processes, and different concentrations can affect their efficiency. Another topic to consider is the use of biotechnology to produce a novel protein. Biotechnology has enabled the production of several novel proteins, including insulin and human growth hormone. You can investigate the production of a novel protein using biotechnology.

Other unique or interdisciplinary topics

Finally, there are several unique or interdisciplinary topics that you can consider for your Biology IA. For example, you can investigate the use of algae as a biofuel source. Algae are a promising biofuel source since they can produce high levels of lipids, which can be converted into biofuels. Alternatively, you can investigate the impact of music on plant growth. There are several studies that suggest that music can affect plant growth, and you can investigate this further. Another topic to consider is the effect of temperature on the metabolic rate of reptiles. Reptiles are cold-blooded animals, and their body temperature is regulated by the environment. You can investigate the effect of different temperatures on the metabolic rate of reptiles, which can have important implications for their survival in changing environments.

When selecting a Biology IA topic, it is important to consider your interests, strengths, feasibility, and the potential research questions. By choosing a topic that aligns with your passions and capabilities, you can conduct a successful research project that showcases your scientific knowledge and research skills. These Biology IA topic ideas are just a starting point, and you can tailor them to your interests and research goals. Remember to be creative and innovative when selecting a topic and have fun exploring the exciting world of biology!

Selecting the best Biology IA topic can be a challenging task. However, by considering your interests, strengths, feasibility, and the potential research questions, you can choose a topic that aligns with your passions and capabilities.  By using the resources available through the IB writing service , you can learn valuable writing skills and improve your overall academic performance.

This article provided some Biology IA topics that students can consider and some tips on how to choose the best topic for their research. By following these tips and exploring different topic ideas, students can conduct a successful Biology IA project that showcases their scientific knowledge and research skills.

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50+ IB Biology IA Ideas

Request free trial class, ib biology sl ia ideas.

The IB Biology SL Internal Assessment (IA) is a project that requires students to complete an independent research project on a chosen theme. The IA is worth 20% of the final assessment and is an opportunity for students to showcase their understanding of the subject. Here are some carefully curated IB Biology SL IA topic ideas to help students get started. These ideas have been tried and tested and are popular with examiners. The list includes the basic reasons for investigating each topic, possible independent and dependent variables, and the experimental setup. It’s important to consider if the topics can be applied to one’s own life, as this shows personal engagement.

1.) How do different sodium chloride concentrations affect seed germination in the bougainvillaea plant?

Experimental setup:.

Soak the bougainvillaea seeds in sodium chloride of varying concentrations for a specific time period. Place them in Petri dishes and count the number of seeds that germinate. Conduct at least 5 trials, excluding control. 

Independent Variable:

Sodium chloride concentrations

Dependent Variable:

Seed germination percentage

2.) How does extract of the seeds and the leaves of the moringa plant (herbal medicine) show antifungal activity against the Malassezia yeast (Pittosporum) fungi?

Experimental setup: , mix yeast and herbal medicine. then use agar plates and fungus to test their effectiveness by seeing how many fungi grow in the different plates. , independent variable: .

Seeds and the leaves of the moringa plant

Dependent Variable: 

Antifungal activity

3.) How does the concentration of zinc chloride affect the growth of plaque?

Mix different concentrations of zinc chloride in different agar plates and bacteria, and check for plaque formation over time. 

Concentration of zinc chloride

Growth of plaque

4.) How effective are synthetic antibacterial products compared to natural antibacterial products against the growth of Cut bacterium acne?

Chose a synthetic and natural antibacterial product and mix them with a little water to create diluted solutions of them. Then use agar plates and bacteria to test their effectiveness by seeing how many bacteria grow in the different plates.

Types of antibacterial products (Natural vs synthetic)

Growth of Cut bacterium acne

5.) How do the different teas, used to water Vignata radiata seeds, affect the germination rate?

Place Viganata radiata seeds into various Petri dishes of the same number. Water them regularly using a diluted solution of different types of teas. Count the number of seeds that germinate over time and take note. Repeat the same procedure 5 times, including control. 

The different types of teas (green tea, chamomile, etc)

The rate of germination of Vignata radiata

6.) How do varying salinity levels affect the rate of germination in the grass species Spartina anglica and Eragrostis plana?

Use different concentrations of salinity levels in petri dishes with the two different grass species and compare the rate of gemination over a period of time. Repeat for five trials.

Salinity levels

Germination rate

7.) What is the effect of potassium ion concentration (ppm) on the initial (day 0 to day 2) rate of growth of Hygrophilla difformis through mass change per day (g/day) over a period of 1 week?

Use various concentrations of potassium in the soil in which the hygrophilla difformis has been planted to asses rate of growth over 1 week. compare the different pots containing varied concentrations to conclude on the optimum level..

Potassium concentration

Rate of growth

8.) Effect of different concentrations of fertilisers on growth of Solanum lycopersicum?

In various pots (atleast 5) containing Solanum lycopersicum, add varied levels of fertiliser concentration and assess rate of growth over a period of time.

Fertilizer concentration

9.) Effects of the addition of different concentrations of 11% humic acid and 5% fulvic acid on rate of growth and fruit development in Solanum lycopersicum L?

Take the required number of pots, and add humic and fluvic acid to Solanum Lycopersicum in soil of varying concentrations and asses the rate of growth over and fruit development over a fixed period of time. Compare the different pots containing varied concentrations to conclude on the optimum combination.

Mixture of humic and fulvic acid

Rate of change of the height of the plant

10.) To what extent does light intensity affect the concentration of sucrose within a kiwi?

Exposing samples of kiwi concentrate to different light intensities for certain periods of time and measuring their sucrose concentrations before and after.

  • Light Intensity

Sucrose Concentration

11.) Effect of Potassium concentration on the growth rate of Raphanus sativus (Radishes)?

Planting and growing radishes within the same type of soil of different potassium ion concentrations.

Potassium Ion Concentration

Length of shoot and root of Raphanus sativus

12.) Effect of temperature on the concentration of Vitamin C within various citrus fruits?

Extracting different citrus fruit concentrates such as grapefruits, oranges and lemons and heating these samples at different temperatures for a certain duration and measuring their Vitamin C concentration before and after.

Temperature

  • Citrus Fruits

Vitamin C Concentration

13.) Investigating the effect of different light intensities and frequencies on the rate of photosynthesis in Spinacia Oleracea.

Exposing samples of Spinacia oleracea(spinach) leaves to different light intensities for certain periods of time and measuring the rate of photosynthesis.

  • Frequency of Light

Rate of Photosynthesis of Spinacia Oleracea

14.) Examining the relationship between temperature and the rate of cellular respiration in yeast.

Under different environmental temperatures within a certain time period, we measure the amount of carbon dioxide and water released by samples of yeast as a measure of their rate of cellular respiration..

Rate of Respiration (By measuring the amount of carbon dioxide and water released)

15.) To what extent does the frequency and wavelength of sound affect the growth of Triticum Aestivum

Observing the germination rate and rate of growth of Triticum Aestivum under sound treatment with different frequencies and wavelengths of sound.

  • Frequency of sound
  • Wavelength of sound
  • Germination rate of Triticum Aestivum
  • Growth rate of Triticum Aestivum

16.) Investigating the effect of salt concentration on the germination rate of Raphanus Sativus.

Analysing and measuring the germination rate of Raphanus Sativus seeds(radish seeds) with provision of various concentrations of salt dissolved in water.

Concentrations of salt in water

Rate of germination of Raphanus Sativus

17.) To what extent does light wavelength and light intensity affect the rate of curdling of cow milk.

Placing various samples of milk underneath different light intensities(low, medium, high) and wavelengths(normal, no light, red, blue, etc.) for a duration of 2 hours and observing the rate of curdling by measuring the change concentration of lactic acid. The milk is curdled by first heating the milk until it comes to a boil and then placing a fixed amount of curd into the samples.

  • Light wavelength

Change in concentration of Lactic acid in cow milk

18.) Examining the relationship between the concentration of carbon dioxide and the rate of photosynthesis in Elodea.

Measuring the effect of various concentrations of carbon dioxide on the photosynthesis of samples of Elodea for a certain duration of time.

  • Carbon dioxide concentration

Rate of photosynthesis(Amount of oxygen and glucose produced)

19.) Investigating the effect of different pollutants on the oxygen content of various aquatic environment water

Placing various types of pollutants within samples of aquatic environmental water and measuring the change in quantity of dissolved oxygen within the sample..

Various types of pollutants and different aquatic environmental water samples

Change in quantity of dissolved oxygen

20.) How does the concentration of sucrose affect the rate of osmosis in potato cells?

Cut identical pieces of potato and place them in solutions of different concentrations of sucrose. Measure the change in mass of the potato pieces over time.

Concentration of sucrose solution

Change in mass of potato pieces

21.) What is the effect of caffeine on the heart rate of daphnia?

Observe the heart rate of daphnia under the influence of caffeine at different concentrations..

Concentration of caffeine

Heart rate of daphnia

22.) What is the effect of different types of music on the growth rate of pea plants?

Play different genres of music to pea plants and measure the rate of growth.

Genre of music

Rate of growth of pea plants

23.) How does the concentration of salt affect the activity of the amylase enzyme in saliva?

Add amylase enzyme to saliva at different concentrations of salt and measure the rate of starch breakdown.

Concentration of salt in saliva

Rate of starch breakdown

24.) How does the temperature affect the rate of respiration in yeast cells?

Measure the rate of carbon dioxide production by yeast cells at different temperatures.

Rate of carbon dioxide production

25.) Investigating the effect of temperature and carbon dioxide on the rate of enzyme activity and fermentation in Saccharomyces cerevisiae

Exposing samples of Saccharomyces cerevisiae (yeast) to different temperatures and carbon dioxide concentrations and measuring the rate of enzyme activity and fermentation.

  • Carbon Dioxide
  • Rate of Enzyme Activity of Saccharomyces cerevisiae
  • Rate of Fermentation

26.) Investigating the effect of different concentrations of salt on the germination and growth rate of Phaseolus vulgaris

Germinating samples of Phaseolus vulgaris (common bean) in solutions of different concentrations of salt and magnesium and measuring the germination and growth rate.

  • Concentration of Salt
  • Concentration of Magnesium
  • Germination Rate of Phaseolus vulgaris
  • Growth Rate of Phaseolus vulgaris

27.) Investigating the effect of pH and light intensity on the activity of catalase and its rate of denaturation extracted from Prunus avium

Extracting and exposing samples of Prunus avium(cherries) to solutions of different pH values and light intensities and measuring the activity of catalase and its rate of denaturation.

  • pH of solution

Light intensity

  • Activity of Catalase from Prunus avium
  • Rate of denaturation

28.) Investigating the effect of temperature and carbon dioxide concentration on the rate of photosynthesis in Elodea canadensis

Exposing samples of Elodea canadensis (Canadian waterweed) to different temperatures and measuring the rate of photosynthesis using a dissolved oxygen probe.

  • Temperature of the water in which Elodea canadensis is placed.

Rate of photosynthesis in Elodea canadensis measured by the amount of oxygen produced.

29.) Investigating the effect of different environmental conditions on the ripening of Citrus × sinensis, Citrus × aurantiifolia and Citrus × paradisi

Create a study that monitors the levels of ethylene or CO2 in fruits over a period of time, while subjecting different fruits to varying independent variables.

  • Concentration of Ethylene
  • Concentration of CO 2

30.) Investigating the effect of nitrate and magnesium concentration in soil on the germination and folate content of Solanum lycopersicum.

Growing samples of Solanum lycopersicum (tomato) in different types of soil and measuring the growth and folate content of samples.

  • Nitrate concentration of soil

Magnesium concentration of soil

  • Growth of Solanum lycopersicum.
  • Folate content of Solanum lycopersicum

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ib biology ia essay examples

IB Biology HL IA Ideas

The IB Biology HL Internal Assessment (IA) is a 20% project that requires students to complete an independent research project on a chosen theme. Here are some carefully curated IB Biology HL IA topic ideas to help students get started. These ideas have been tried and tested and are popular with examiners. The list includes the basic reasons for investigating each topic, possible independent and dependent variables, and the experimental setup. It’s important to consider if the topics can be applied to one’s own life, as this shows personal engagement.

1.) How do temperature and light intensity that affects photosynthesis balance out each other when it comes to the time taken for photosynthesis to occur?

Expose selected plants with different levels of temperature and light intensity to find the optimum combination for maximum growth rate. Conduct at least 5 trials, excluding control. 

Temperature and light intensity

Time taken for photosynthesis

2.) To what extent does scarification have an effect on germination percentage and shoot growth?

Select a seed that requires scarification and treat it with different methods of scarification like heat, acid and freeze-thaw. Conduct at least 5 trials, excluding control. Compare results to conclude which scarification is most effective. 

Types of scarification

Germination percentage and shoot growth

3.) How do cumin and turmeric powder, in comparison to indigestion tablets, affect the rate of neutralization of hydrochloric acid, measured by the difference of change in pH levels in 5 minutes?

Measure every 5 minutes, the amount of time it takes for the pH of hydrochloric acid to reach a neutral state (pH of 7) when adding cumin and turmeric powder to one sample and indigestion tablets to another sample. Conduct at least 5 trials, excluding control. 

Cumin and turmeric powder

Rate of neutralization of hydrochloric acid

4.) How do different concentrations of Gibberellic acid affect the germination of a Dolly Parton rose?

Soak the Dolly Parton rose seeds in Gibberellic acid of varying concentrations for a specific time period. Place them in Petri dishes and count the number of seeds that germinate. Conduct at least 5 trials, excluding control. 

Different concentrations of Gibberellic acid

Germination of a Dolly Parton rose

5.) What is the effect of different concentrations of green tea extract on the rate of fermentation of yeast?

Add yeast to various Petri dishes containing water with different concentrations of green tea extract. Over time, calculate the pH to determine the level of carbon dioxide produced by the yeast. 

Different concentrations of green tea extract

Change in carbon dioxide concentration produced by yeast

6.) What is the effect of changing the light intensity on the speed of wood louse Armadillidium Vulgare?

Use atleast 5 different light intensities in an enclosed glass container with the wood louse Armadillidium Vulgare and capture the movement of the creature to asses speed.

7.) Comparing the vitamin C or ascorbic acid concentration in store-bought fruit juices and fresh fruits using a titrimetric method?

Fruit samples must be blended with metaphosphoric acid. The homogenous mixture must be measured around and diluted into a volumetric flask with metaphosphoric acid (HPO3). The diluted sample must then be filtered to remove away suspension using a vacuum pump before 10 ml aliquote of the filtrate is pipetted into a small Erlenmeyer flask. The filtrate must be immediately titrated with a dye solution to a faint pink endpoint.

Type of packed and fresh juices

Amount of iodine, types of fruits

8.) An Investigation on the Effect of Varying Concentrations of Amino Acid Glycine on the Seed Germination of Phaseolus vulgaris Seeds?

Take the required number of petri dishes, and add varying concentrations of amino acid glycine to Phaseolus vulgaris Seeds. Asses the rate of germination over a fixed period of time and compare results to optimum concentration.

Varying concentrations of Glycine

Seed germination

9.) Effect of different caffeine concentrations on the blinking rate of the human eye?

Providing different people categorized on age, weight and height, different concentrations of caffeine and recording their blinking rate for a duration of 5 minutes with a reliable camera

Caffeine Concentration

Blinking rate of the human eye

10.) Determination of the ideal pH and temperature for accelerated germination of tomatoes?

Placing different groups of tomato seeds in various combinations of pH and temperature conditions and determining the ideal pH and temperature conditions based upon number of seeds germinated and time consumed to do so.

Germination of Tomato seeds

11.) Investigation of the effects of magnesium on the rate of photosynthesis in Brassica Rapa.

Measuring the rate of photosynthesis of various samples of Brassica Rapa which have been planted utilising the same type of soil or fertiliser but with various concentrations of magnesium.

Rate of photosynthesis of Brassicar Rapa

12.) Investigation of pH and salt concentration on the heart rate of daphnia, a type of water flea.

Under different environmental conditions of pH and salt concentration, measure the heart rate of daphnia under a microscope and count the number of heart beats within a certain time period.

pH and Salt concentration of water

Heart rate of water flea

13.) Analysis of the relationships between various abiotic factors such as and the diversity of plant species in a specific ecosystem.

Research upon different types of ecosystems that seem to be similar but have different abiotic factors and observe the different species within the ecosystem and understand the possible reasons as to the amount of biodiversity in the ecosystem.

Abiotic factors

Biodiversity of ecosystem

14.) Examination of the effect of different types of oil on the cellular structure of plant cells of Solanum Tuberosum

Soaking samples of Solanum Tuberosum within various types of oils for a certain duration of time and analysing the cellular structure of plant cells, primarily the shape of their cell wall.

Type of Oil

Cell wall structure and other cellular components of Solanum Tuberosum

15.) To what extent does different types of cooking techniques have on the concentration of vitamin A in Daucus Carota

Measure the vitamin A concentration of Daucus Carota samples before they undergo cooking in various ways such as boiling, pan-frying, grilling and more and then measuring the vitamin A concentration after the cooking process and comparing the vitamin A concentration.

Method of Cooking

Vitamin A concentration

16.) Investigating the ideal ratio of potassium:magnesium in fertilisers on the growth of seedlings of Zingiber officinale.

Placing seedlings of Zingiber officinale that are approximately the same age and measuring the rate of growth with shoot and root length over a fixed period of time within samples of soil with different potassium:magnesium ratios

Ratio of potassium:magnesium in fertiliser

  • Shoot length of Zingiber Officinale
  • Root length of Zingiber Officinale

17.) To what extent does temperature and light intensity affect the concentration of phenolic acid within samples of Rubus Idaeus

Heat samples of Rubus Idaeus concentrate and measure the concentration of phenolic acids before and after the process.

Concentration of phenolic acid of Rubus Idaeus sample

18.) Examination of the effects of different physical and chemical treatments on the germination and growth of Carica papaya seeds.

Provide various types of treatments to samples of Carica papaya seeds and measure the germination and growth rate of these seeds.

Types of treatment(physic

  • Germination of Carica papaya
  • Growth rate of Carica papaya

19.) What is the effect of light intensity on the rate of photosynthesis in spinach leaves?

Place spinach leaves in different light intensities and measure the rate of oxygen production.

Rate of oxygen production

20.) How does the presence of salt affect the germination of bean seeds?

Plant bean seeds in soil with varying concentrations of salt and measure the rate of germination.

Concentration of salt in soil

Rate of germination

21.) What is the effect of pH on the activity of lactase enzyme in milk?

Add lactase enzyme to milk at different pH levels and measure the rate of lactose breakdown.

pH level of milk

Rate of lactose breakdown

22.) How does the presence of different types of antibiotics affect the growth of E.coli bacteria?

Culture E.coli bacteria in the presence of different types of antibiotics and measure the rate of growth.

Type of antibiotic

Rate of growth of E.coli bacteria

23.) What is the effect of light wavelength on the rate of photosynthesis in elodea plants?

Illuminate elodea plants with different wavelengths of light and measure the rate of oxygen production.

Wavelength of light

24.) How does the salinity of water affect the survival of brine shrimp?

Place brine shrimp in water of different salinity levels and measure the survival rate.

Salinity of water

Survival rate of brine shrimp

25.) Investigation of the effect of different light wavelengths and intensities on the growth and starch content of Arabidopsis thaliana.

Growing samples of Arabidopsis thaliana (thale cress) under different wavelengths of light and evaluating their growth rates and starch content.

  • Light Wavelength
  • Growth rate of Arabidopsis thaliana
  • Starch Content of Arabidopsis thaliana

26.) Investigation of the effect of different hormones and light wavelength on the development of embryos of Xenopus laevis.

Treating fertilized eggs of Xenopus laevis (African clawed frog) with different hormones and light wavelengths and measuring the development of the embryos.

  • Type of Hormone
  • Development of Xenopus laevis embryos

27.) Investigation of the effect of exercise on the concentration of lactate and potassium in the blood of humans

Having human participants engage in different levels and intensities of exercise and measuring the concentration of lactate and potassium in their blood.

  • Level and Intensity of Exercise
  • Concentration of Lactate in the Blood of Humans

28.) Investigation of the effect of different antibiotics in different pH concentrations on the growth of Bifidobacterium

Growing samples of Bifidobacterium in the presence of different antibiotics and pH environments and measuring their growth.

  • Type of Antibiotic
  • Growth of Bifidobacterium

29.) Investigation of the effect of different concentrations of carbon dioxide on the rate of photosynthesis and respiration in Chlorella vulgaris

Exposing samples of Chlorella vulgaris (green algae) to different concentrations of carbon dioxide and measuring the rate of photosynthesis and respiration.

  • Concentration of Carbon Dioxide
  • Rate of Photosynthesis of Chlorella vulgaris
  • Rate of Respiration of Chlorella vulgaris

30.) Investigation of the effect of different environmental conditions on the behavior and lifespan of Drosophila melanogaster

Observing the behavior and lifespan of Drosophila melanogaster under different environmental conditions, such as temperature, humidity, and light exposure.

  • Light Exposure and more
  • Behavior of Drosophila melanogaster
  • Lifespan of Drosophila melanogaster

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IA Examples / Topics

A compilation of Math IA, Physics IA, Chemistry IA, Economics IA, English Oral, English HL Essay, SEHS IA, Business Management IA and more 

SEHS IA (HL) 23/24 - Effect of preliminary exercise on anaerobic performance

SEHS IA (HL) 23/24 - Effect of preliminary exercise on anaerobic performance

Visual Arts Process Portfolio (SL) 32/34 - Impact of Australian Bushfire Crisis

Visual Arts Process Portfolio (SL) 32/34 - Impact of Australian Bushfire Crisis

Mathematics IA (SL) 17/20 - Sound, pitch and tuning in music

Mathematics IA (SL) 17/20 - Sound, pitch and tuning in music

Chemistry HL IA [24/24] - Effect of pH on fluorescence of fluorescein

Chemistry HL IA [24/24] - Effect of pH on fluorescence of fluorescein

Biology SL IA [24/24] - Inhibition of bacillus subtilis using acetic acid

Biology SL IA [24/24] - Inhibition of bacillus subtilis using acetic acid

Mathematics SL IA [20/20] - Optimal basketball angle and velocity

Mathematics SL IA [20/20] - Optimal basketball angle and velocity

Mathematics (SL) IA [19/20] - Modelling the temperature of a cup of tea

Mathematics (SL) IA [19/20] - Modelling the temperature of a cup of tea

Film Comparative Study (HL) 31/32 - Queer Cinema

Film Comparative Study (HL) 31/32 - Queer Cinema

English Literature Essay (HL) 20/20 - Marcovaldo

English Literature Essay (HL) 20/20 - Marcovaldo

Visual Arts Comparative Study (SL) 30/30 - Changing Australian Landscapes

Visual Arts Comparative Study (SL) 30/30 - Changing Australian Landscapes

SEHS (HL) 24/24 - Active Static Stretching and Hamstring Contractile Force

SEHS (HL) 24/24 - Active Static Stretching and Hamstring Contractile Force

SEHS IA (HL) 24/24 - Fatigue and Power

SEHS IA (HL) 24/24 - Fatigue and Power

Biology (HL) 24/24 - Microbial enzymatic activity

Biology (HL) 24/24 - Microbial enzymatic activity

Chemistry (HL) 24/24 - Activation energy of catalysed decomposition of H2O2

Chemistry (HL) 24/24 - Activation energy of catalysed decomposition of H2O2

SEHS IA (HL) 24/24 - Isometric resistance, aerobic exercise and blood pressure

SEHS IA (HL) 24/24 - Isometric resistance, aerobic exercise and blood pressure

Physics (HL) 24/24 - Height of the Chain Fountain (Mould effect)

Physics (HL) 24/24 - Height of the Chain Fountain (Mould effect)

Visual Arts Process Portfolio (SL) 32/34

Visual Arts Process Portfolio (SL) 32/34

English Language and Literature Essay (HL) 19/20 - The Great Gatsby

English Language and Literature Essay (HL) 19/20 - The Great Gatsby

English Language and Literature Essay (HL) 19/20 - Wislawa Szymborska

English Language and Literature Essay (HL) 19/20 - Wislawa Szymborska

Physics IA (HL) 22/24 - Time, temperature and conductive heat transfer

Physics IA (HL) 22/24 - Time, temperature and conductive heat transfer

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  1. IB Biology IA examples

    All Biology IA Examples Filter exemplars IB Common App Category IA EE TOK Other Subject Type a subject Grade 7 6 5 4 3 2 1 Level HL SL Session May 2024 May 2023 November 2022 May 2022 November 2021 May 2021 November 2020 May 2020 November 2019 Other Apply

  2. IB Biology IA: 60 Examples and Guidance

    1 - Investigating the effect of different types of sugars on the rate of fermentation by yeast. To investigate the effect of different concentrations of a specific herbicide on the growth rate of a particular plant species, one could set up an experiment in which the plants are grown in soil with varying concentrations of the herbicide.

  3. How to Write a Top Tier Biology IA (With Examples)

    There are a selection of criteria that any good RQ must meet. The IB are looking for a Research Question that represents a diploma-level investigation that is suitably demanding. It must also be relevant to the IB Biology syllabus, as well as touching on an area of personal interest for the student, and have a real world application.

  4. 50 IB Biology IA Ideas

    50 IB Biology IA Ideas Stuck for Ideas planning your Biology IA? In this post, we give you 50 IB Biology IA Ideas to help you speed up your research process.

  5. Biology IA Topic Ideas + Examples

    December 1, 2023 Have you got your biology IA deadline approaching soon and are unsure what to choose as your topic? Don't fret, this post is here to help you through that process! In this text, we will provide you with numerous biology IA ideas with examples to help you start the writing process.

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    25th Jan 2023 Table of content Sitting in that quiet corner, sipping hot chocolate, hoping it rains IB Biology IA ideas, instead, going blank and utterly confused? We don't want that to happen, do we? Choosing the perfect IB Biology IA idea is only the first step in making one's IB Biology Investigation, but definitely, the most significant.

  7. IB Biology IA Format: Everything IB Students Need to Know

    Math IAs How It Works Pricing IB Writing Services Extended Essays Guide for Students to the IB Biology IA Format Ah, the allure of the International Baccalaureate (IB)! While involved with IB, I've noticed that mastering the IB Biology IA is no small feat. However, it's not as intimidating as it might seem at first.

  8. 30 IB Biology IA Topic Ideas!

    Biology ia ideas with independent variables. 1, Look at the genetic similarities and differences between species, kingdoms, phylas, classes, genuses, orders, families, and domains. 2, Testing global warming: How does CO2, water vapour, oxygen, or any other variable affect temperature inside a cutoff bottle exposed to simulated sunlight?

  9. How to present your IB Biology IA Method

    • Avoid writing the Method as a continuous prose style essay as it is difficult to follow the steps. Break it up into paragraphs, each of which describes a particular step. Example of a poor presentation of an IB Biology IA Method. ... This guide is the ultimate IB Biology IA checklist, providing detailed guidance on the essential tools and ...

  10. Biology IA Checklist 2022: Step by Step Guide for a Perfect IA

    Background â-¡ The essay is organized into paragraphs and includes an introduction, body and conclusion â-¡ The introduction includes an observation/ story that leads to the research question

  11. The Complete IB Extended Essay Guide: Examples, Topics, and Ideas

    Here is a range of sample topics with the attached extended essay: Biology: ... 40+ Sample Extended Essays for the IB Diploma Programme. In case you want a little more guidance on how to get an A on your EE, here are over 40 excellent (grade A) sample extended essays for your reading pleasure. Essays are grouped by IB subject.

  12. How to write Biology Internal Assessment. Comprehensive Guide

    Step 1: Understand the Requirements of the IA Writing a Biology Internal Assessment (IA) is a critical part of any high school science curriculum. An IA is a research paper that needs to be prepared according to certain standards and guidelines.

  13. 70 IB Biology IA Ideas

    5 min read 70 IB Biology IA Ideas Welcome to our blog post on IB Biology Internal Assessment (IA) ideas! If you're an IB Biology student, you know that the IA is a crucial part of your coursework and can make or break your final grade. But coming up with a research question can be a daunting task.

  14. 12 Examples and Tips for IB Biology IA

    12 Examples and Tips for IB Biology IA May 4, 2022 | IB subjects IA is one of the many things IB students struggle with, but some might feel that writing the IA in Biology is especially confusing since it covers broad topics.

  15. Clastify

    Clastify - IA, EE and TOK examples The Fast Track To Excellent Coursework Struggling to navigate the complexities of your IB coursework? Feel like you're in a labyrinth with no map? That's why we created Clastify. Explore IAs Explore EEs Explore TOK Our Marked Exemplars Are Moderated By IB Examiners With 10+ Years of Experience

  16. 30 investigation ideas for Biology IA

    This page is a simple list of general biological ideas for investigations. It will be useful for students who are lost for an idea, or teachers who are looking for something to inspire a particular student. Of course the ideas are just ideas, nothing is specified and all the details will need to be explored and evaluated by students during their investigations.Toothpaste is labelled according ...

  17. IB Biology IA Topics That Don't Require Experiment

    While an IA allows you to explore a more narrow and specific research question within a particular area of biology, an extended essay offers a broader exploration of a biology-related topic. The IA emphasizes experimentation, data collection, and analysis, whereas the extended essay prioritizes in-depth literature research and an extensive ...

  18. Example IB Biology IA

    Example IB Biology IA - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document is in no way endorsed by the IBO, nor should it be used as such. It should not be replicated in any manner for submission as IB assessment. The time it takes for a seed to germinate varies between species.

  19. IB IA examples for all subjects

    IA Biology HL 5. How does the use of germination stimulators; mineral "Seedboodster Plus" and hummus-based "Brunatne BioZloto" affect germination capacity (GC), germination speed (GS) and mean germination time (MGT) of fresh and old seeds of alfalfa (Medicago sativa)? IA Biology HL 6. High scoring IB Internal Assessment examples for all ...

  20. Biology IA Topics: 20+ Great Ideas to Get You Started

    The IB Biology IA assignment isn't as lengthy as the extended essay in the same subject, but it can be quite involving. You'll conduct extensive experiments and the writing process is going to be somewhat longer. To have an easy time working on the subject, it's best to choose a topic that interests you, so you can focus on an area that ...

  21. Biology IA topics

    Biology IA topics. Biology Internal Assessment is a crucial component of the International Baccalaureate Biology course, and it requires students to conduct independent research on a topic of their choice. This task aims to assess students' understanding of scientific research and their ability to apply scientific concepts and principles to a ...

  22. 50+ IB Biology IA Ideas

    IB Biology HL IA Ideas. The IB Biology HL Internal Assessment (IA) is a 20% project that requires students to complete an independent research project on a chosen theme. Here are some carefully curated IB Biology HL IA topic ideas to help students get started. These ideas have been tried and tested and are popular with examiners.

  23. IA Exemplars

    Quick View Mathematics IA (SL) 17/20 - Sound, pitch and tuning in music AU$25.00 Add to Cart Quick View Chemistry HL IA [24/24] - Effect of pH on fluorescence of fluorescein AU$30.00 Add to Cart Quick View Biology SL IA [24/24] - Inhibition of bacillus subtilis using acetic acid AU$30.00 Add to Cart