CAPE Biology Unit 2 · January 2023 · Paper 2

38 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)2 marksWrite a balanced chemical equation to summarize the process of aerobic respiration.
2. 1(b)2 marksList TWO characteristics of gaseous exchange surfaces in mammals.
3. 1(c)6 marksSuggest THREE ways in which respiration differs from breathing.
4. 1(d)(i)1 markName the process being demonstrated in Figure 1.
5. 1(d)(ii)4 marksName the structures in humans that are represented by the following labels on the apparatus in Figure 1. Label: Glass tube (vertical), Balloons, Bell jar, Rubber sheet. Name of corresponding structure:
6. 1(d)(iii)2 marksSuggest TWO reasons why a glass bell jar was used instead of a plastic bag, in setting up the experiment.
7. 1(d)(iv)2 marksState TWO consequences of a puncture in the human structure that is represented by the rubber sheet.
8. 1(d)(v)1 markDuring the experiment, a student pulls the rubber sheet downwards. State the expected observation.
9. 1(d)(vi)2 marksGive TWO reasons for the expected observation stated in (v).
10. 1(e)3 marksList THREE precautions that should be taken when setting up the apparatus in Figure 1 on page 5.
11. 2(a)4 marksDefine the terms 'effector' and 'receptor' and give ONE example of each. Effector: Definition, Example. Receptor: Definition, Example.
12. 2(b)1 markName a specialized cell found in the nervous system.
13. 2(c)2 marksDefine the term 'stimulus'.
14. 2(d)(i)4 marksExplain how the response to a named stimulus is important for the survival of EACH of the following organisms. Earthworm: Stimulus, Response, How response aids survival.
15. 2(d)(ii)4 marksExplain how the response to a named stimulus is important for the survival of EACH of the following organisms. Green plant: Stimulus, Response, How response aids survival.
16. 3(a)(i)2 marksDefine the term 'species'.
17. 3(a)(ii)2 marksSuggest TWO possible outcomes if the two species compete for the same resources.
18. 3(b)(i)3 marksDefine the following terms: Carnivore, Omnivore, Herbivore.
19. 3(b)(ii)3 marksDraw a food chain with the FOUR organisms listed.
20. 3(b)(iii)2 marksIdentify the herbivore and carnivore from the food chain.
21. 3(c)3 marksExplain the changes in the population density of the rabbits and wolves with time.
22. 4(a)4 marksState the name of TWO processes by which organisms reproduce asexually. For EACH process, provide ONE example of an organism which reproduces in this way.
23. 4(b)2 marksAsexual reproduction is NOT suitable for organisms which live in an environment that changes often. Explain ONE reason to support this statement.
24. 4(c)(i)2 marksDefine the following terms: Gene.
25. 4(c)(ii)2 marksDefine the following terms: Allele.
26. 4(d)(i)5 marksUsing a genetic diagram, show the cross between Mary's parents.
27. 4(d)(ii)1 markState Mary's genotype:
28. 4(d)(iii)1 markBased on the results of the cross in (d) (i), state the probability of a child having attached earlobes.
29. 5(a)2 marksState TWO functions of the human skeleton.
30. 5(b)2 marksName the TWO muscles labelled X and Y. X:, Y:.
31. 5(c)(i)2 marksName the type of joints found in EACH of the following: Knee:, Hip:.
32. 5(c)(ii)3 marksExplain ONE way in which the function of the knee and hip joints are similar and ONE way in which the function of the knee joint differs from the hip joint.
33. 5(d)4 marksSuggest FOUR ways in which the animal may be affected by the broken limb.
34. 5(e)2 marksDescribe ONE way in which the growth of the plant differs from that of the puppy.
35. 6(a)4 marksSuggest TWO methods other than the use of insecticides that a country could utilize to eradicate mosquitoes. For EACH method suggested, name the stage of the mosquito's life cycle on which the method is effective.
36. 6(b)2 marksList TWO diseases which would become prominent in a country which has a large mosquito population.
37. 6(c)4 marksState the trend in the number of mosquito-related disease cases between 2017 and 2019 and suggest THREE reasons for this trend.
38. 6(d)5 marksState the name of a process, other than reproduction, which may have led to the increase in the mosquito population and explain how this increase occurred despite the use of DDT.