CSEC Biology · January 2015 · Paper 2

31 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)2 marksIdentify the type of reproduction carried out by EACH of the plant organs shown in Figure 1. A: B:
2. 1(a)(ii)3 marksOutline the sequence of events that would take place from pollination to the formation of the seed/fruit from the organ shown in Figure 1B.
3. 1(b)4 marksDescribe TWO differences between the outcomes of cell division by mitosis and cell division by meiosis.
4. 1(c)3 marksDeduce the genotypes of the parent plants. Explain your answer with the aid of a genetic diagram.
5. 1(d)(i)1 markMeasure the length of the radicle of the seedling on EACH day and record your measurements in Table 1.
6. 1(d)(ii)4 marksPlot the data in Table 1 on the graph paper below. Put days on the horizontal (x) axis.
7. 1(d)(iii)2 marksState TWO factors, other than water, that are required for the germination of the seed shown in Figure 2.
8. 1(d)(iv)4 marksDescribe an investigation to test the hypothesis, 'Water is needed for the germination of seeds'.
9. 1(e)2 marksSuggest why the cotyledons (seed leaves) become smaller as the primary leaves increase in size.
10. 2(a)(i)5 marksIdentify the structures labelled I, II, III, IV and V in Figure 3. I: II: III: IV: V:
11. 2(a)(ii)2 marksUsing the symbol, X, indicate on Figure 3, TWO places where protein digestion takes place.
12. 2(a)(iii)2 marksSuggest TWO reasons why the locations indicated in (a)(ii) are suitable for protein digestion to take place.
13. 2(a)(iv)2 marksGive TWO reasons why living organisms need protein.
14. 2(b)(i)2 marksBriefly describe ONE route by which the nitrogen excreted from animals (in the form of urea) is made available to plants.
15. 2(b)(ii)2 marksSuggest TWO signs of nitrogen deficiency in plants.
16. 3(a)5 marksChoose the correct term from the following list and complete the concept map in Figure 4.
17. 3(b)3 marksSuggest THREE ways in which physiological diseases may be managed.
18. 3(c)(i)1 markFor which category of diseases would gene therapy be appropriate?
19. 3(c)(ii)2 marksSuggest TWO ways, other than gene therapy, in which genetic engineering is used for the prevention and treatment of diseases.
20. 3(d)(i)2 marksName TWO diseases transmitted by a named insect vector.
21. 3(d)(ii)2 marksSuggest TWO measures that could be used to control the population of the insect vector named in (d)(i).
22. 4(a)6 marksIdentify the structures labelled P, Q and R in Figure 5 and state the role of EACH in photosynthesis. P Role Q Role R Role
23. 4(b)4 marksDescribe ONE difference in the cuticles and ONE difference in the lower epidermis of the two plants, A and B, and explain the significance of these differences.
24. 4(c)5 marksSuggest the type of environment in which each plant, Plant A and Plant B would be found growing, and THREE adaptations expected in Plant B, other than those shown in Figure 5. Environment for Plant A Environment for…
25. 5(a)5 marksDraw a clearly labelled diagram to show the internal structure of human skin.
26. 5(b)(i)7 marksExplain how the biologist's skin allowed him to maintain a relatively normal body temperature during his first day and night in the desert. In your answer, state the term used to describe the maintenance of a constant…
27. 5(b)(ii)3 marksSuggest TWO ways the biologist could modify his behavior during the day, and ONE way during the night, to help regulate his body temperature in the desert.
28. 6(a)(i)4 marksComplete Table 2 to match EACH organism with its natural habitat.
29. 6(a)(ii)2 marksDescribe briefly a technique for sampling organisms in the pond.
30. 6(b)6 marksExplain THREE factors that may have caused a lower yield of tomatoes in Harry's plot.
31. 6(c)3 marksSuggest THREE ways by which human activity could adversely affect an oyster population living in a mangrove swamp.