CSEC Biology · May/June 2013 · 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)3 marksIn the space below, construct a table using the data presented in Figure 1.
2. 1(b)2 marksSuggest TWO causes of variation among members of the same species.
3. 1(c)4 marksExplain how the type of variation shown in Table 1 differs from the type of variation represented by Figure 1.
4. 1(d)(i)2 marksName TWO substances that are transported by blood.
5. 1(d)(ii)4 marksExplain how this will affect the ability of these three students to perform well in sports.
6. 1(e)(i)4 marksDraw and annotate a diagram to show how the following materials could be set up to investigate the rate at which water moves through the xylem vessels under TWO different conditions. Materials: 2 beakers, water, dye,…
7. 1(e)(ii)2 marksWrite a suitable hypothesis for this investigation.
8. 1(f)4 marksRelate the structure of xylem vessels to their role in the transport of water through plant stems.
9. 2(a)4 marksOn Figure 2, write the name of the part and use a label line to identify EACH of the following parts of the eye: (i) The light sensitive layer (ii) The jelly-like substance that keeps the eye in shape (iii) Carries…
10. 2(b)(i)2 marksName the stimulus for EACH set of seedlings. Seedlings in A Seedlings in B
11. 2(b)(ii)1 markName the hormone responsible for the response of the cucumber seedlings in B.
12. 2(b)(iii)2 marksSuggest how the types of movement described in A and B may be useful to the seedlings.
13. 2(c)4 marksDescribe ONE similarity and ONE difference between the response of soil invertebrates and the response of the cucumber seedlings in B. Similarity Difference
14. 2(d)2 marksOutline TWO ways in which the nervous system functions differently from the endocrine system in humans.
15. 3(a)2 marksName TWO metabolic waste products excreted by plants.
16. 3(b)(i)3 marksName the parts labelled A, B and C in Figure 3.
17. 3(b)(ii)2 marksUse arrows on the diagram in Figure 3 to show the pathway taken by urine on its way out of the male's body.
18. 3(c)(i)2 marksExplain how ONE structure in Figure 3 can be manipulated to achieve permanent sterility in males.
19. 3(c)(ii)2 marksExplain how tubal ligation results in sterility in females.
20. 3(d)4 marksExplain TWO ways in which this method of reproduction is different from reproduction in humans.
21. 4(a)2 marksName TWO ways by which the human body prevents itself from becoming infected.
22. 4(b)(i)6 marksDescribe the life cycle of a named insect vector.
23. 4(b)(ii)6 marksExplain how knowledge of the life cycle of this insect vector can be used to prevent the transmission of a named pathogenic disease.
24. 4(c)(i)7 marksExplain how a vaccine can provide the student with active acquired immunity against this disease.
25. 4(c)(ii)7 marksDiscuss why a vaccine that provides passive acquired immunity is NOT suitable for this student.
26. 5(a)6 marksDefine EACH of the following terms with reference to the mangrove swamp ecosystem: Population Physical (abiotic) factors Habitat
27. 5(b)6 marksPropose ONE argument to support this plan and TWO arguments against it.
28. 5(c)3 marksExplain the effect on the carbon cycle of cutting and burning large areas of mangrove trees across the Caribbean.
29. 6(a)(i)6 marksSketch an outline of the human body and show the location of the pancreas and the pituitary gland in the outline.
30. 6(a)(ii)6 marksName ONE hormone secreted from EACH of the endocrine glands in (a)(i) above.
31. 6(a)(iii)6 marksName TWO factors that may affect the activity of these enzymes.
32. 6(b)5 marksExplain how hormones secreted from the pancreas work together with the liver to regulate blood sugar levels.
33. 6(c)4 markshow would a hormone secreted from your pituitary gland work to prevent you from becoming completely dehydrated?