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GCSE OCR Biology A Papers 2 and 4
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#1. True or false – plants remove carbon from the atmosphere during photosynthesis
#2. Which type of factor is competition?
#3. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)
#4. What do we call animals that eat both other animals and plants?
#5. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.
#6. What is groundwater?
#7. Which of these processes allows saltwater to become potable?
#8. Which type of factor is nutrient availability?
#9. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?
#10. Which of the following organisms belong to the kingdom – animals?
Select all that apply:
#11. Why can humans only survive a few days without water?
#12. Which of these is a community?
#13. Why do plants need oxygen?
#14. Nitrogen is often found in a particular form in the soil what is this form?
#15. Which term do we use to describe the relationships between species that depend on each other for resources?
#16. By which process does water in the oceans and lakes move into the atmosphere?
#17. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats
#18. What do we mean by the distribution of organisms?
#19. What is the binomial name for humans?
#20. Which of the following are strategies organisms use to adapt to changing abiotic conditions?
Select all that apply:
#21. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?
#22. What natural source of nitrogen is sometimes added to fields by farmers?
#23. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?
#24. How does nitrogen in plants get into the soil?
#25. Which type of factor is water availability?
#26. Which type of factor is pollution?
#27. How can we increase the accuracy of abundance estimates?
#28. How do we describe the periodic changes in population size of predators and prey – explained by increases in numbers of predators due to increased numbers of prey and then decreasing numbers of prey due to increasing numbers of predators and so on?
#29. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?
#30. Which of these is a habitat?
#31. In mutualistic feeding relationships – which organisms benefit?
#32. We sometimes use a transect to perform systematic sampling. This involves which of the following?
#33. Which square instrument do we use for randomly sampling population sizes?
#34. Which of the following is the source of coal?
#35. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth
#36. What is a parasite?
#37. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus
Select all that apply:
#38. Which type of factor is disease?
#39. Which type of factor is predation?
#40. When fossil fuels are burned they release carbon into the atmosphere – which of the following are fossil fuels?
#41. In typical feeding relationships there are two elements – what are they?
#42. What are nitrogen-fixing bacteria?
#43. Where does the water in lakes and rivers end up?
#44. Why do plants need nitrogen?
#45. Which type of factor is soil composition?
#46. In some areas where there are poor soils (not enough nitrogen) carnivorous plants have adapted to get their nitrogen from which source?
#47. Why is the binomial naming system useful for scientists?
#48. Where are nitrogen-fixing bacteria found in plants such as peas and beans?
#49. Which of these is a population?
#50. Which of these is an example of a mutualistic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A tick and a dog
#51. Sometimes it is not possible to measure the number of organisms in a transect, for example when measuring the distribution of plants. In this case we use an alternative measure called what?
#52. What does abundance measure?
#53. What are biotic factors?
#54. How do most plants get their nitrogen?
#55. Who invented the binomial naming system?
Uh oh, maybe you need some lessons!
#56. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.
#57. Which type of factor is parasitism?
#58. Which of these substances is sometimes added to water to make it potable?
#59. What are the three domains?
#60. True or false – carbon dioxide is removed from the atmosphere as it dissolves in the oceans?
#61. Which of the following is the correct word equation for aerobic respiration?
#62. What is the correct order of groups in the Linnaean Classification system?
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#63. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....
#64. Which type of factor is air temperature?
#65. Which of these is an ecosystem?
#66. What do we call animals that are eaten by other animals?
#67. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?
#68. Which organisms maintain the nitrogen levels in the soil?
#69. Decomposers break down dead animal and plant material – what happens to the carbon inside the dead organisms?
#70. In parasitic feeding relationships there are two elements – what are they?
#71. Which of the following is the source of oil and gas?
#72. The water cycle has one part where water is in solid form – what is that form of storage?
#73. By which process does water in the clouds move onto land?
#74. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?
Select all that apply:
#75. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.
#76. What are abiotic factors?
#77. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?
#78. How much of the atmosphere is composed of nitrogen?
#79. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?
#80. By which process does water in the atmosphere become part of clouds?
#81. Which are the two kinds of sampling we normally use?
Select all that apply: