CSEC Biology · May/June 2014 · Paper 2

33 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)(i)3 marksConstruct a table in the space below to classify the fish in Figure 1 into groups using TWO visible features other than size.
2. 1(a)(ii)2 marksA gill from one of the fish is shown in Figure 2. Annotate Figure 2 to illustrate TWO characteristics that make the gill suitable for gaseous exchange.
3. 1(a)(iii)2 marksState TWO reasons why gaseous exchange is important in living organisms.
4. 1(b)(i)2 marksIdentify TWO producers in the food web in Figure 3.
5. 1(b)(ii)2 marksState TWO characteristics of producers in a food web.
6. 1(b)(iii)2 marksIdentify the type of feeding relationship between the coral and the zooxanthellae and give a reason for your answer.
7. 1(c)(i)6 marksRepresent the data in Table 1 on a suitable graph on the grid provided on page 7.
8. 1(c)(ii)2 marksSuggest an explanation for the differences in the shapes of the graphs.
9. 1(c)(iii)2 marksName TWO features that the predatory fish may have that allow it to carry out its role as a predator.
10. 1(c)(iv)2 marksSuggest what the likely consequences would be if the population size of the predatory fish is NOT controlled.
11. 2(a)(i)3 marksIdentify the structures labelled A, B and C in Figure 4. Write your answers on the lines provided in Figure 4.
12. 2(a)(ii)2 marksExplain how the function of the heart may be affected by a blockage of the blood vessel shown at X.
13. 2(b)(i)1 markWhich blood vessel, A or B, represents a vein?
14. 2(b)(ii)1 markIdentify ONE structure visible in Figure 5 which helps a vein to carry out its function.
15. 2(b)(iii)2 marksExplain how the structure identified in (b)(ii) allows the vein to fulfil its function.
16. 2(b)(iv)2 marksExplain how such deposits may lead to hypertension.
17. 2(c)2 marksIdentify the vessels shown at Positions P and Q in Figure 6.
18. 2(d)2 marksExplain why plants do NOT need an organ like a heart in their transport system, and outline ONE mechanism by which plants move fluids through their transport vessels.
19. 3(a)(i)6 marksIdentify the structures labelled A, B and C in Figure 7 and briefly describe the process that takes place in EACH of these structures.
20. 3(a)(ii)1 markName the hormone secreted by the pituitary gland when there is NOT enough water in body cells.
21. 3(a)(iii)4 marksExplain why the composition of urine produced at X would differ in someone who drank a lot of water compared to someone who had no water to drink for over 24 hours.
22. 3(b)(i)2 marksExplain why there is glucose in the urine of the diabetic person, assuming that the kidneys are functioning properly.
23. 3(b)(ii)2 marksDescribe TWO ways of managing diabetes mellitus.
24. 4(a)6 marksWith the aid of a diagram, outline THREE processes which return carbon to the atmosphere and ONE which removes it. (Include the form in which the carbon is found in the atmosphere.)
25. 4(b)6 marksDescribe the impact of cutting down or burning large areas of forest on the recycling of carbon.
26. 4(c)3 marksSuggest THREE ways in which humans can make changes in their day-to-day activities to reduce the amount of carbon in the atmosphere.
27. 5(a)4 marksDefine the terms 'genotype', 'phenotype', 'recessive' and 'dominant'.
28. 5(b)(i)2 marksGive TWO examples of traits that show continuous variation.
29. 5(b)(ii)5 marksUsing appropriate symbols, draw a genetics diagram to show the genotypes of the parents and the expected phenotypes of the offspring.
30. 5(c)4 marksUse the theory of natural selection to account for this.
31. 6(a)(i)6 marksName THREE types of tissue which coordinate to bring about movement in animals, and state THREE reasons why it is important for animals to be able to move.
32. 6(a)(ii)2 marksExplain why, unlike animals, plants are able to survive without moving from place to place.
33. 6(b)7 marksDescribe the changes that occurred in the father's eyes to keep his son's face in focus.