CSEC Biology · January 2016 · 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)5 marksOn the grid provided below, plot the data obtained for both plants on the same graph, using appropriate scales and legends.
2. 1(b)(i)2 marksDescribe the pattern of growth obtained for EACH plant.
3. 1(b)(ii)4 marksExplain the differences observed in the growth of the plants under these two conditions (light and dark).
4. 1(c)2 marksComplete the following definition for 'growth' by writing the correct words from the list in brackets. (transient, temporary, mass, permanent, organs) Growth may be defined as a _______________ increase in the…
5. 1(d)1 markSuggest why the measurements of length taken for the plants are incomplete, UNLIKE the measurements taken for a baby.
6. 1(e)2 marksSuggest TWO ways in which this experiment could be refined to obtain more accurate data for measuring growth.
7. 1(f)2 marksDescribe ONE way in which the pattern of growth in plants differs from the pattern of growth in animals.
8. 1(g)(i)2 marksDescribe an experiment to demonstrate the response of plants exposed to light on one side only.
9. 1(g)(ii)1 markHow does this response to light benefit plants in a forest?
10. 1(g)(iii)3 marksExplain how and why the response of invertebrates (like earthworms) to light differs from that shown by plants.
11. 1(h)1 markState ONE role that light plays in human growth and development.
12. 2(a)3 marksComplete the diagram by writing the appropriate term in EACH of the boxes labelled A, B and C.
13. 2(b)(i)2 marksWrite a chemical equation and a word equation to summarize EACH of the following processes: Photosynthesis
14. 2(b)(ii)2 marksWrite a chemical equation and a word equation to summarize EACH of the following processes: Aerobic respiration
15. 2(c)2 marksOutline TWO outcomes of the removal of trees by cutting and burning.
16. 2(d)2 marksSuggest TWO ways in which small island states such as those in the Caribbean may be affected by large-scale climate change.
17. 2(e)(i)2 marksOutline TWO ways in which the improper disposal of household waste contributes to land pollution or water pollution.
18. 2(e)(ii)2 marksSuggest TWO ways by which people could dispose of their household waste in an environmentally friendly manner.
19. 3(a)(i)5 marksIdentify the structures labelled I, II, III, IV and V in Figure 2. Write your answers in the spaces provided in Figure 2.
20. 3(a)(ii)2 marksState ONE function of EACH of the structures labelled I and IV.
21. 3(b)6 marksIn the space below, draw an annotated diagram to show the appearance of the guard cells after the plant is watered in the early morning. Use an arrow to show the movement of the water in the cell.
22. 3(c)2 marksExplain why the behaviour of an animal cell would differ from that of a plant guard cell when they are placed in dilute solutions.
23. 4(a)10 marksWith the aid of a labelled diagram of the human alimentary canal, explain how a sandwich consisting of bread and chicken is digested to supply the body with nutrients.
24. 4(b)(i)2 marksName TWO storage organs in plants and the nutrients stored in EACH.
25. 4(b)(ii)3 marksSuggest THREE reasons why plants need to store nutrients.
26. 5(a)8 marksName FOUR major components that make up human blood, and explain how the oxygen transported by the blood becomes available to cells for the production of energy.
27. 5(b)(i)2 marksDescribe TWO symptoms of sickle-cell anaemia.
28. 5(b)(ii)5 marksFazul and Shanna both carry the sickle-cell trait. What is the chance that a child born to them would suffer from sickle-cell anaemia? Explain your answer with the aid of a genetic diagram. Use the following symbols: A…
29. 6(a)6 marksDescribe the process of genetic engineering, and state TWO advantages and TWO disadvantages of this technology.
30. 6(b)(i)4 marksSuggest what might have led to the appearance of this deep red colour, and describe ONE negative implication for biological evolution.
31. 6(b)(ii)5 marksDescribe an approach, other than selecting seeds, that the farmer could have adopted for introducing new traits in his tomato crop, and explain how this process differs from the process occurring in nature.