GCSE OCR Biology A Papers 2 and 4

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OCR Biology A Papers 2 and 4

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OCR Biology A Papers 2 and 4

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#1. What is potable water?

#2. Decomposers break down dead animal and plant material – what happens to the carbon inside the dead organisms?

#3. What is a parasite?

#4. Which type of factor is water availability?

#5. Which of these processes allows saltwater to become potable?

#6. When fossil fuels are burned they release carbon into the atmosphere – which of the following are fossil fuels?

#7. Which type of factor is nutrient availability?

#8. What is the binomial name for humans?

#9. In mutualistic feeding relationships – which organisms benefit?

#10. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?

#11. Which organisms maintain the nitrogen levels in the soil?

#12. Match the description to the correct term. All of the organisms that live in a particular pond.

#13. Which type of factor is disease?

#14. In typical feeding relationships there are two elements – what are they?

#15. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?

#16. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?

Select all that apply:

#17. Which of these substances is sometimes added to water to make it potable?

#18. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....

#19. Which type of factor is parasitism?

#20. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?

#21. Why do we use systematic or random sampling of an area to determine the distribution or abundance of organisms?

#22. Which of the following are strategies organisms use to adapt to changing abiotic conditions?

Select all that apply:

#23. Why is the binomial naming system useful for scientists?

#24. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?

#25. Which type of factor is air temperature?

#26. What is the correct order of groups in the Linnaean Classification system?

Remember:

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#27. Where are nitrogen-fixing bacteria found in plants such as peas and beans?

#28. Why do plants need nitrogen?

#29. What are nitrogen-fixing bacteria?

#30. In parasitic feeding relationships there are two elements – what are they?

#31. Why do plants need oxygen?

#32. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.

#33. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.

#34. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth

#35. The water cycle has one part where water is in solid form – what is that form of storage?

#36. What does abundance measure?

#37. What do we call animals that are eaten by other animals?

#38. Which of these is a habitat?

#39. Which of the following is the correct word equation for aerobic respiration?

#40. Which of the following is the source of oil and gas?

#41. 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

#42. What are the three domains?

#43. In some areas where there are poor soils (not enough nitrogen) carnivorous plants have adapted to get their nitrogen from which source?

#44. True or false – plants remove carbon from the atmosphere during photosynthesis

#45. Which of the following organisms belong to the kingdom – animals?

Select all that apply:

#46. How can we increase the accuracy of abundance estimates?

#47. Which of these is a community?

#48. Which type of factor is soil composition?

#49. Which type of factor is pollution?

#50. Nitrogen is often found in a particular form in the soil what is this form?

#51. Predators are essential for healthy ecosystems – what happens if predators are removed due to extinction?

#52. True or false – carbon dioxide is removed from the atmosphere as it dissolves in the oceans?

#53. What are abiotic factors?

#54. Which square instrument do we use for randomly sampling population sizes?

#55. Which are the two kinds of sampling we normally use?

Select all that apply:

#56. By which process does water in the clouds move onto land?

#57. True or false – volcanism removes carbon from the atmosphere

#58. Which term do we use to describe the relationships between species that depend on each other for resources?

#59. Producers are organisms which do what?

#60. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?

#61. What do we mean by the distribution of organisms?

#62. Who invented the binomial naming system?

Uh oh, maybe you need some lessons!

#63. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus

Select all that apply:

#64. What do we call animals that only eat plants?

#65. What natural source of nitrogen is sometimes added to fields by farmers?

#66. Which type of factor is competition?

#67. Which of these is an example of a parasitic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A coral polyp and single-celled algae

#68. If grass is eaten by a rabbit and a rabbit is eaten by a hawk. What level of consumer is the hawk?

#69. What do we call animals that eat both other animals and plants?

#70. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.

#71. Where does the water in lakes and rivers end up?

#72. Which of these is a population?

#73. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?

#74. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?

#75. By which process does water in the oceans and lakes move into the atmosphere?

#76. By which process does water in the atmosphere become part of clouds?

#77. How do most plants get their nitrogen?

#78. Which type of factor is predation?

#79. 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?

#80. Which of these is an ecosystem?

#81. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats

#82. Which of the following is the source of coal?

#83. We sometimes use a transect to perform systematic sampling. This involves which of the following?

#84. What is groundwater?

#85. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)

#86. How much of the atmosphere is composed of nitrogen?

#87. How can parasites affect the nutrition of their hosts?

#88. 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.

#89. 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?

#90. What are biotic factors?

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