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.

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

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

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

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

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

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

7. How does sudden exercise affect heart rate and baroreceptor feedback?

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

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

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

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

12. How does temperature affect transpiration rates in a plant species?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

27. How does age affect the accuracy of an eye test?

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

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

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

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

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

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

34. How does temperature affect the rate of fermentation in yeast?

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

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

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

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

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

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

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

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

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

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

45. 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?

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

47. How does pollution affect the biodiversity of a local ecosystem?

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

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

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

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

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

53. How does age affect human reaction times?

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

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

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

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

58. 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?

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

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

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

62. How do enzymes affect cheese production?

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

64. How does age affect the visibility of root hair cells?

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

66. How does time affect the plasmolysis of potatoes?

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

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

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

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