CSEC Biology · January 2010 · 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)4 marksIn the space provided, produce a diagram to show how the apparatus in Figure 1 could have been set up for this investigation.
2. 1(b)(i)2 marksComplete Table 1 by calculating the total and percentage of larvae on the dark side and the light side of the petri dish. Write your answer in Table 1.
3. 1(b)(ii)2 marksDo the results of this investigation support the student's hypothesis? Give a reason for your answer.
4. 1(b)(iii)2 marksName TWO factors OTHER THAN light that could have influenced the larvae's response.
5. 1(b)(iv)2 marksDescribe how the apparatus shown in (a) could be modified to investigate ONE of the factors named in (b) (iii).
6. 1(b)(v)2 marksExplain how the response shown by the larvae in this experiment could help them to survive in their natural environment.
7. 1(c)(i)2 marksHow does the response shown in Figure 2 benefit the plant?
8. 1(c)(ii)3 marksDescribe an experiment to determine whether a leaf on a potted plant has been photosynthesizing.
9. 1(c)(iii)2 marksName TWO conditions OTHER THAN light, that are necessary for photosynthesis.
10. 1(d)(i)2 marksWhy is this an important step in the investigation?
11. 1(d)(ii)2 marksExplain why the response to gravity is essential for plant survival.
12. 2(a)(i)4 marksName the structures labelled P, Q, R and S in Figure 3.
13. 2(a)(ii)2 marksIdentify the gases indicated by the arrows, A and B, in Figure 3.
14. 2(b)(i)1 markName the process by which gases move in the directions shown by the arrows.
15. 2(b)(ii)1 markIdentify ONE feature illustrated in the diagram which shows that the alveolus is suitable for gaseous exchange.
16. 2(c)2 marksWhat is the role of breathing in the movement of the gases illustrated in Figure 3?
17. 2(d)2 marksA person who is exercising vigorously breathes more deeply and rapidly than someone who is resting. Give TWO reasons why this is necessary.
18. 2(e)3 marksExplain how cigarette smoking can reduce the efficiency of the lungs.
19. 3(a)(i)4 marksIdentify the structures labelled I to IV in Figure 4.
20. 3(a)(ii)1 markWhat is the function of the structure labelled IV?
21. 3(b)(i)2 marksName ONE method of dispersal for EACH of the following: Red pea (Red kidney bean) Coconut
22. 3(b)(ii)2 marksSuggest TWO features of the coconut shown in Figure 4 that are important in its dispersal.
23. 3(b)(iii)3 marksSuggest why coconut trees are usually found along the coastlines of islands while red pea plants are found inland.
24. 3(c)(i)1 markIdentify the method of dispersal of the thorn apple fruit shown in Figure 5.
25. 3(c)(ii)2 marksSuggest why thorn apple plants are usually found growing in clusters around the parent plant.
26. 4(a)4 marksDescribe the process by which carbon dioxide and water are made into carbohydrates by green plants.
27. 4(b)2 marksIn a large tree most structures are NOT green. Explain how such structures get the food materials they need to survive.
28. 4(c)3 marksSuggest THREE factors or conditions which determine whether plants store either very little or very much of the food they make.
29. 4(d)6 marksOutline THREE reasons for leaving ‘green spaces', such as parks and woodlands, within crowded cities, even when there may be a shortage of land for housing and industrial development.
30. 5(a)(i)9 marksDraw a simple diagram in the box below to show the relative positions of the following organs of the human digestive system: Mouth/oesophagus, Stomach, Liver, Pancreas, Small intestine.
31. 5(a)(ii)1 markAnnotate the diagram to show the functions of any FOUR of the organs.
32. 5(a)(iii)1 markThe alimentary canal in humans is designed for a varied diet, yet some people choose to become vegetarians. Suggest how vegetarians can make up for any limitations associated with their diet.
33. 5(b)4 marksCertain organs associated with digestion, for example, the pancreas, also have endocrine functions. How would removal of the pancreas affect its endocrine function?
34. 5(c)2 marksAlthough plants make their own food, they may suffer from deficiency diseases. Explain how deficiency diseases are likely to arise in plants.
35. 6(a)6 marksUsing annotated diagrams, compare the structure of an unspecialized plant cell with that of an unspecialized animal cell.
36. 6(b)3 marksNerve cells become specialized to carry out their function. Suggest THREE features of a nerve cell which enable it to carry out its function effectively.
37. 6(c)(i)6 marksIdentify TWO physical factors which animals encounter (face) in an aquatic habitat, such as a freshwater pond.
38. 6(c)(ii)1 markSuggest TWO adaptations that animals in a freshwater pond might have. Explain how EACH adaptation is useful to the animal.