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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. Our goal is to guide you in meeting the IB criteria and ensure you stay on track during the entire IA writing process. Whether you are interested in plants, animals or any other aspect of biology, the suggestions below are sure to have something that suits your needs!
Biology IA Research Question Generator
Try our RQ Generator for free. Enter a topic and we'll instantly generated research questions that perfectly align with IB criteria.
Biology IA Ideas
A. Unity and Diversity
Rate of protein digestion: In this topic, you can explore the enzyme-inhibiting effects of coffee by measuring the rate of protein digestion when different concentrations of coffee are used to hydrolyze the protein albumin, which is found in eggs.
Catalase enzyme activity: Within this topic, you could look at how the enzyme activity of catalase in liver samples changes as the temperature is increased, measured by the height of foam produced over the sample.
Lactase activity: Looking at this topic, you can explore how the rate of lactase activity changes as the concentration of lactose is changed upon dilution with water. The rate of lactase activity can be measured by how fast glucose is produced.
Hydrolysis of casein: Through this idea, you could look at how increasing the temperature affects the hydrolysis of casein by zingipain, measured by using a colorimeter to measure the absorbance of green light.
Preventing browning of apples: Through this topic, you can explore how different concentrations of lemon juice added to blended apple samples can slow down the rate of enzymatic browning of apples.
Sugar solution and respiration of yeast: Looking at this topic, you could investigate how changing the type of sugar solution used (such as glucose, fructose, etc.) affects the rate of anaerobic respiration of yeast.
pH and respiration of yeast: In this topic, you could analyze how changing the pH affects the rate of respiration of yeast, which can be measured by looking at the amount of CO2 produced over a period of time.
Growth rate of yeast: In this topic, you can look at how changing the distance of a UV lamp from yeast affects its growth rate, as measured by the amount of carbon dioxide produced.
B. Form and Function
Osmosis simulation: Through this exploration, you can look at how changing the sodium chloride concentration affects the rate of mass change of potato strips, which simulates how osmosis occurs due to salts in living organisms.
Protein content of milk: Exploring this topic, you can compare the amount of protein in plant-based milk (such as almond, soy, and rice milk) and animal milk (such as cow and goat milk) to determine which one gives consumers more protein.
Ascorbic acid in peppers and onions: Through this analysis, you could research how the amount of ascorbic acid in bell peppers and onions varies based on the colour of the bell peppers and onions (yellow, red, and green bell peppers, and yellow, red, and white onions).
Energy content of chocolate bars: In this topic, you could compare the energy content of different brands of chocolate bars by measuring the energy change of water when the chocolate bar is burned.
Rice soaking: In this topic, you could investigate how increasing the number of hours that rice is soaked can affect the amount of arsenic left behind in the rice, which has implications for human health.
Absorption of iron: Within this topic, you could research how increasing the concentration of tannic acid affects the amount of iron absorbed in 20 minutes. This simulates green tea, in which tannins are commonly found, so you could explore if green tea could help with iron absorption.
Mass of clam shells: In this topic, you can research how changing the pH affects the mass of clam shells since the shells are made of calcium carbonate, which will react under acidic conditions.
C. Interaction and Interdependence
Rate of photosynthesis: In this topic, you can look into how the rate of photosynthesis of plants changes as the concentration of sodium bicarbonate is increased, as well as find the optimum amount of sodium bicarbonate that gives the greatest rate of photosynthesis.
Potassium chloride and germination: In this investigation, you could explore how increasing the concentration of potassium chloride could affect the rate of germination of a plant.
Germinability of plants: Through this experiment, you can explore how using different types of tea, such as chamomile, dandelion, nettle, etc,. can affect the germination success of plants over a certain time period.
Hydrogen peroxide and germination: Through this topic, you could explore how increasing the concentration of hydrogen peroxide affects the rate of germination of plants, by measuring the length of the radicals.
UV radiation and germination: In this topic, you could explore how changing the duration that UV-B radiation is shone on plants can affect their success of germination, which simulates the effects of the natural UV rays that plants are exposed to from the Sun.
Pesticides and bacteria: Through this topic, you can look at how increasing the amount of pesticides applied to a soil sample can affect the rate of bacterial growth in the soil.
Detergent and leaf health: Within this topic, you could research how the chlorophyll A and B content of a plant varies as the concentration of powdered detergent in the irrigation solution used to water the plant is increased.
Effects of mouthwash: In this exploration, you can study the effects of different types of active ingredients in mouthwash (such as brine, peroxide, etc.) on their ability to inhibit the growth of bacteria.
Velocity of water and shrimp: In this exploration, you could look at how changing the velocity of water affects the abundance of freshwater shrimp present in a certain location.
Carbon stock in mangroves: Through this topic, you can look at whether there is a significant difference in the carbon stock of trees commonly found in mangroves, to see which one sequesters carbon the best.
D. Continuity and Change
Reaction time studies: In this topic, you could explore how the reaction time to a visual stimulus changes as the age of the participants of the study increases.
Muscle development and sleep: Through this experiment, you can explore how the number of hours of sleep a person gets correlates to the amount of muscle development that the person has.
Hypertension mortality rate: In this exploration, you can analyze the relationship between the Human Development Index and mortality rate due to hypertension, which can give an indication of how factors like education and income can affect mortality rates within a country.
Field of vision studies: Through this topic, you could look at how a person's binocular field of vision can be impacted by their interpupillary distance. You could analyze different age groups to see how vision changes as people age.
Neurodegenerative health: Looking at this topic, you can explore if there is a correlation between the amount of coffee consumed and the risk of neurodegenerative diseases, such as Parkinson's disease, across different countries.
For more IA ideas and a deeper insight into how to structure your IAs, head to the Clastify website, where you will be able to find numerous Biology IA topics as well as exemplar IAs that you can refer to during your writing process!
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. Our goal is to guide you in meeting the IB criteria and ensure you stay on track during the entire IA writing process. Whether you are interested in plants, animals or any other aspect of biology, the suggestions below are sure to have something that suits your needs!
Biology IA Research Question Generator
Try our RQ Generator for free. Enter a topic and we'll instantly generated research questions that perfectly align with IB criteria.
Biology IA Ideas
A. Unity and Diversity
Rate of protein digestion: In this topic, you can explore the enzyme-inhibiting effects of coffee by measuring the rate of protein digestion when different concentrations of coffee are used to hydrolyze the protein albumin, which is found in eggs.
Catalase enzyme activity: Within this topic, you could look at how the enzyme activity of catalase in liver samples changes as the temperature is increased, measured by the height of foam produced over the sample.
Lactase activity: Looking at this topic, you can explore how the rate of lactase activity changes as the concentration of lactose is changed upon dilution with water. The rate of lactase activity can be measured by how fast glucose is produced.
Hydrolysis of casein: Through this idea, you could look at how increasing the temperature affects the hydrolysis of casein by zingipain, measured by using a colorimeter to measure the absorbance of green light.
Preventing browning of apples: Through this topic, you can explore how different concentrations of lemon juice added to blended apple samples can slow down the rate of enzymatic browning of apples.
Sugar solution and respiration of yeast: Looking at this topic, you could investigate how changing the type of sugar solution used (such as glucose, fructose, etc.) affects the rate of anaerobic respiration of yeast.
pH and respiration of yeast: In this topic, you could analyze how changing the pH affects the rate of respiration of yeast, which can be measured by looking at the amount of CO2 produced over a period of time.
Growth rate of yeast: In this topic, you can look at how changing the distance of a UV lamp from yeast affects its growth rate, as measured by the amount of carbon dioxide produced.
B. Form and Function
Osmosis simulation: Through this exploration, you can look at how changing the sodium chloride concentration affects the rate of mass change of potato strips, which simulates how osmosis occurs due to salts in living organisms.
Protein content of milk: Exploring this topic, you can compare the amount of protein in plant-based milk (such as almond, soy, and rice milk) and animal milk (such as cow and goat milk) to determine which one gives consumers more protein.
Ascorbic acid in peppers and onions: Through this analysis, you could research how the amount of ascorbic acid in bell peppers and onions varies based on the colour of the bell peppers and onions (yellow, red, and green bell peppers, and yellow, red, and white onions).
Energy content of chocolate bars: In this topic, you could compare the energy content of different brands of chocolate bars by measuring the energy change of water when the chocolate bar is burned.
Rice soaking: In this topic, you could investigate how increasing the number of hours that rice is soaked can affect the amount of arsenic left behind in the rice, which has implications for human health.
Absorption of iron: Within this topic, you could research how increasing the concentration of tannic acid affects the amount of iron absorbed in 20 minutes. This simulates green tea, in which tannins are commonly found, so you could explore if green tea could help with iron absorption.
Mass of clam shells: In this topic, you can research how changing the pH affects the mass of clam shells since the shells are made of calcium carbonate, which will react under acidic conditions.
C. Interaction and Interdependence
Rate of photosynthesis: In this topic, you can look into how the rate of photosynthesis of plants changes as the concentration of sodium bicarbonate is increased, as well as find the optimum amount of sodium bicarbonate that gives the greatest rate of photosynthesis.
Potassium chloride and germination: In this investigation, you could explore how increasing the concentration of potassium chloride could affect the rate of germination of a plant.
Germinability of plants: Through this experiment, you can explore how using different types of tea, such as chamomile, dandelion, nettle, etc,. can affect the germination success of plants over a certain time period.
Hydrogen peroxide and germination: Through this topic, you could explore how increasing the concentration of hydrogen peroxide affects the rate of germination of plants, by measuring the length of the radicals.
UV radiation and germination: In this topic, you could explore how changing the duration that UV-B radiation is shone on plants can affect their success of germination, which simulates the effects of the natural UV rays that plants are exposed to from the Sun.
Pesticides and bacteria: Through this topic, you can look at how increasing the amount of pesticides applied to a soil sample can affect the rate of bacterial growth in the soil.
Detergent and leaf health: Within this topic, you could research how the chlorophyll A and B content of a plant varies as the concentration of powdered detergent in the irrigation solution used to water the plant is increased.
Effects of mouthwash: In this exploration, you can study the effects of different types of active ingredients in mouthwash (such as brine, peroxide, etc.) on their ability to inhibit the growth of bacteria.
Velocity of water and shrimp: In this exploration, you could look at how changing the velocity of water affects the abundance of freshwater shrimp present in a certain location.
Carbon stock in mangroves: Through this topic, you can look at whether there is a significant difference in the carbon stock of trees commonly found in mangroves, to see which one sequesters carbon the best.
D. Continuity and Change
Reaction time studies: In this topic, you could explore how the reaction time to a visual stimulus changes as the age of the participants of the study increases.
Muscle development and sleep: Through this experiment, you can explore how the number of hours of sleep a person gets correlates to the amount of muscle development that the person has.
Hypertension mortality rate: In this exploration, you can analyze the relationship between the Human Development Index and mortality rate due to hypertension, which can give an indication of how factors like education and income can affect mortality rates within a country.
Field of vision studies: Through this topic, you could look at how a person's binocular field of vision can be impacted by their interpupillary distance. You could analyze different age groups to see how vision changes as people age.
Neurodegenerative health: Looking at this topic, you can explore if there is a correlation between the amount of coffee consumed and the risk of neurodegenerative diseases, such as Parkinson's disease, across different countries.
For more IA ideas and a deeper insight into how to structure your IAs, head to the Clastify website, where you will be able to find numerous Biology IA topics as well as exemplar IAs that you can refer to during your writing process!
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