CSEC Biology · January 2020 · Paper 2

30 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)4 marksBriefly describe the process of transpiration in plants. Your description must include the names of TWO of the organs involved in transpiration.
2. 1(a)(ii)9 marksUse the grid on page 5 to draw a graph of the results.
3. 1(a)(iii)1 markUsing the results from Table 1, state how the rate of transpiration changes as the relative humidity changes.
4. 1(a)(iv)2 marksSuggest TWO ways by which the results given in Table 1 support your answer in (a)(iii).
5. 1(a)(v)1 markA farmer observed that his plants wilted during the day but recovered at night. Suggest to the farmer ONE reason for this occurrence.
6. 1(b)(i)4 marksSuggest TWO ways in which the animal transport system and the plant transport system are different.
7. 1(b)(ii)2 marksDifferentiate between the transport needs of a unicellular animal and a multicellular animal.
8. 1(b)(iii)2 marksBoth plants and animals need to store food. With reference to ONE storage site in animals, explain why food storage is important.
9. 2(a)(i)6 marksName EACH of the structures labelled A, B, C, D, E and F.
10. 2(a)(ii)4 marksDifferentiate between plant cells and animal cells by identifying TWO differences. Explain how EACH difference is important to the plant's existence.
11. 2(b)(i)4 marksState the expected observation if EACH of the cell types (plant cell and animal cell) was placed in distilled water for 15 minutes. Suggest ONE reason for EACH observation.
12. 2(b)(ii)1 markName the process which is responsible for the observation in (b)(i).
13. 3(a)(i)3 marksDescribe the process by which the structure of the boy's eye will allow him to read the book.
14. 3(a)(ii)3 marksDescribe the process by which the structure of the boy's eye will allow him to observe his friends playing in the distance.
15. 3(b)(i)1 markName the type of corrective lens which would help the boy see distant objects clearly if he is nearsighted.
16. 3(b)(ii)2 marksJohn is nearsighted but his sister Mary has normal vision. What would cause John's sight to be different from Mary's?
17. 3(b)(iii)2 marksHow would wearing corrective lenses/glasses allow John to see objects as clearly as Mary?
18. 3(c)4 marksExplain why the appearance of the boy's eyes while seated under the shade of the tree would be different if he is seated in the sun.
19. 4(a)4 marksName the processes labelled A, B, C and D.
20. 4(b)6 marksRecently, there has been an increase in human activities which resulted in the increase of atmospheric carbon dioxide. Suggest THREE human activities that could have contributed to the increasing levels of carbon in the…
21. 4(c)3 marksSuggest THREE practices that can be adopted to reduce the impact of human activities on the carbon cycle.
22. 4(d)2 marksHuman activities can lead to an increase in greenhouse gases. Name TWO greenhouse gases other than carbon dioxide.
23. 5(a)6 marksComplete the following table to compare the diseases hypertension and yellow fever for each characteristic given.
24. 5(b)3 marksExplain how vaccination works to prevent persons from becoming ill with yellow fever.
25. 5(c)6 marksDiscuss THREE strategies that can be used by hypertensive patients to control their signs/symptoms.
26. 6(a)6 marksDescribe how the human skin helps the body to keep cool on a hot, sunny day.
27. 6(b)3 marksState ONE similarity and ONE difference between human beings and invertebrates in the ways they cool their bodies on hot days.
28. 6(c)(i)6 marksUsing the symbols A to represent a normal allele and a to represent the albino allele, draw a genetic diagram to illustrate how two heterozygous parents could produce an albino child.
29. 6(c)(ii)1 markIdentify the genotype of the albino child.
30. 6(c)(iii)1 markState the probability of the albino child being produced.