CSEC Biology · January 2018 · Paper 2

29 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 marksPlot the data from Table 1 on the grid provided on page 5.
2. 1(b)4 marksName and outline TWO possible sampling methods that the students may have used to collect the data shown in Table 1.
3. 1(c)4 marksSelect from Table 1, ONE organism which belongs to EACH of the following taxonomic groups: Arthropod, Reptile, Bird, Amphibian.
4. 1(d)2 marksExplain how the method of nutrition used by the wild pine differs from the method of nutrition used by the other organisms in the table.
5. 1(e)(i)2 marksName and describe the type of relationship that exists between the wild pine and the tree.
6. 1(e)(ii)2 marksOne student observes an orange-yellow vine growing on one portion of the tree where the leaves are dying. How does the relationship between this vine and the tree differ from the relationship described in (e)(i) above?
7. 1(e)(iii)2 marksState TWO reasons why the vine causes the leaves of the tree to die.
8. 1(f)4 marksOf the six lizards collected, four are green and two are brown. These are later classified by field scientists as members of the same species. Use the theory of natural selection to explain why the green lizards are…
9. 2(a)3 marksComplete Table 2 by listing the final digestive products of the three macronutrients.
10. 2(b)2 marksOutline how the final products of the digestion of protein and fat are transported from the gut to the liver.
11. 2(c)(i)3 marksExplain the role of the pancreas in the digestion of food.
12. 2(c)(ii)2 marksThe line diagram below summarizes the role of the pancreatic hormones in the control of blood glucose levels. Complete the diagram by filling in the boxes with the names of Hormones X and Y.
13. 2(d)2 marksExplain the role of the liver in the homeostatic control of blood glucose levels.
14. 2(e)(i)2 marksWhich person is MOST likely suffering from diabetes mellitus? Give ONE reason for your answer.
15. 2(e)(ii)1 markBased on the data in Figure 1, suggest the range for blood glucose concentration in a healthy person.
16. 3(a)(i)4 marksName the structures labelled I, II, III and IV in Figure 2.
17. 3(a)(ii)2 marksState the function of EACH of the parts labelled II and IV in Figure 2.
18. 3(b)(i)2 marksState TWO ways in which the appearance of the lung of a smoker differs from that of a non-smoker.
19. 3(b)(ii)2 marksSuggest TWO benefits of placing a ban on the smoking of cigarettes in public places.
20. 3(b)(iii)2 marksName the addictive component in cigarettes and suggest ONE negative impact of drug addiction.
21. 3(c)3 marksThe alveolus has a function similar to that of a dicotyledonous leaf. State THREE ways by which a dicotyledonous leaf is adapted to carry out this function.
22. 4(a)6 marksWith the aid of a diagram of a reflex arc, describe the response of an individual whose skin suddenly comes into contact with a hot surface.
23. 4(b)5 marksThe skin plays a role in maintaining a constant body temperature. Explain the skin's role in the reduction of internal body temperature, and suggest ONE reason why the internal body temperature should be kept constant.
24. 4(c)4 marksScientists predict that global temperatures will continue to rise over the next decade. State TWO factors that have contributed to rising global temperatures, and state TWO negative effect of rising global temperatures…
25. 5(a)6 marksName THREE types of diseases and state ONE example of EACH type of disease.
26. 5(b)9 marksImmunity may be naturally or artificially acquired. Discuss THREE differences between natural immunity and artificial immunity, and describe any THREE steps of the mechanism (in the body) by which artificial immunity is…
27. 6(a)2 marksMeiosis results in the formation of gametes. List TWO important events that occur during meiosis that can lead to genetic variation among offspring.
28. 6(b)4 marksDescribe the process by which the male gamete reaches the female gamete in a flower.
29. 6(c)9 marksBoth parents of a haemophiliac child have the normal blood clotting trait. Use a genetic diagram to explain how this child could inherit the trait for haemophilia.