CSEC Biology · May/June 2010 · 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)5 marksIn the space provided below construct a table to show how the data from the experiment might be collected.
2. 1(a)(ii)2 marksExplain why a sample of three plants was used for each test.
3. 1(b)4 marksIn the space provided below, draw a labelled diagram of the apparatus that can be used in an experiment to illustrate that Part Z will take in water for use by Part Y (in Figure 1 on page 2).
4. 1(c)1 markOne function of the plant part shown at Y is storage. Identify ONE organ in the human body that serves the same function.
5. 1(d)3 marksHumans also carry out other functions similar to that shown by the plant species represented at Figure 1, for example, respiration. In investigating respiration in a human being and a plant, explain how you would…
6. 1(e)(i)3 marksOn the diagram in Figure 2, label the following parts using the symbols indicated: P for the place where pollen is produced, O for the place that houses the ovum, S where pollen is deposited.
7. 1(e)(ii)3 marksSuggest how this flower might be pollinated. Explain your answer.
8. 1(f)4 marksSome plant storage organs give rise to offspring. Suggest TWO advantages to the plant of having both flowers, and a storage organ that gives rise to offspring.
9. 2(a)3 marksLabel on the drawing in Figure 3, THREE parts of the seedling shown on Day 5.
10. 2(b)3 marksOutline the changes that took place in the seed to allow the development shown in Figure 3.
11. 2(c)(i)1 markThe development shown by the seedling is a type of 'movement'. What is the name given to this type of movement?
12. 2(c)(ii)4 marksState TWO ways in which the movement shown by the seedling differs from that of an earthworm moving through its burrow.
13. 2(d)(i)2 marksIdentify TWO physical factors that can cause an earthworm to move deeper into its burrow.
14. 2(d)(ii)2 marksExplain why moving deeper into its burrow is important to the earthworm.
15. 3(a)5 marksIdentify, from the food web shown in Figure 4, a food chain with FOUR trophic levels. Draw the food chain in the space provided below.
16. 3(b)(i)2 marksIdentify, from the food web in Figure 4, ONE predator and ONE organism which is likely to be its prey.
17. 3(b)(ii)4 marksIdentify TWO characteristics that will differentiate the predator population from that of the prey.
18. 3(c)(i)2 marksApart from predator/prey, identify ONE other relationship that may exist in a food web, and provide an example.
19. 3(c)(ii)2 marksGive ONE advantage of having special relationships among organisms in a food web.
20. 4(a)(i)9 marksIdentify, with the aid of diagrams, the main stages in the life history of a named insect vector of disease.
21. 4(a)(ii)9 marksExplain how EACH stage in the life history of the insect you identified at (a)(i) might be controlled to keep the vector population in check.
22. 4(b)(i)6 marksSome sexually transmitted infections are caused by viruses and have been found to be without cure. Explain why viral infections are usually very difficult, if not impossible, to cure.
23. 4(b)(ii)6 marksApart from the nature of the AIDS virus, what OTHER factors make the control of this disease very difficult?
24. 5(a)(i)5 marksHow is it possible for plants that have identical genetic make-up to show differences?
25. 5(a)(ii)5 marksSuggest why it is sometimes necessary to breed plants with the same genetic make-up.
26. 5(a)(iii)5 marksGive ONE disadvantage of breeding an identical population of organisms.
27. 5(b)4 marksExplain how this process is different from natural selection.
28. 5(c)(i)6 marksHow does genetic engineering differ from artificial selection?
29. 5(c)(ii)6 marksSuggest TWO concerns people might have about using genetic engineering to alter characteristics of organisms.
30. 6(a)(i)9 marksWith the aid of a diagram, explain how the hind limb in humans allows for movement from one place to another.
31. 6(a)(ii)9 marksGive THREE advantages to humans of their ability to move from one place to another.
32. 6(b)(i)6 marksIdentify TWO means by which seeds are dispersed.
33. 6(b)(ii)6 marksExplain how any TWO characteristics of a seed may be adapted for dispersal.