Biological Evolution · CSEC Biology

15 past-paper questions on Biological Evolution, part of Continuity and Variation, from every CSEC Biology paper on Quelpr.

1. 1(f)4 marks· Biology Q1 1(f)Of 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…
2. 4(c)2 marks· Biology Q4 4(c)Briefly explain how bacteria may become resistant to antibiotics.
3. 5(a)(iii)1 mark· Biology Q5 5(a)(iii)Why would the breeding programme have to continue for many generations?
4. 5(b)4 marks· Biology Q5 5(b)Explain how this process is different from natural selection.
5. 5(b)(ii)2 marks· Biology Q5 5(b)(ii)What might be the advantage to the flower farmer of having a variety with BOTH large flowers and large leaves?
6. 5(b)(iii)2 marks· Biology Q5 5(b)(iii)Give ONE other characteristic of the new flower variety that the flower farmer would want and say why it would be important to the farmer.
7. 5(c)4 marks· Biology Q5 5(c)Use the theory of natural selection to account for this.
8. 6(b)(i)4 marks· Biology Q6 6(b)(i)Suggest what might have led to the appearance of this deep red colour, and describe ONE negative implication for biological evolution.
9. 6(b)(ii)3 marks· Biology Q6 6(b)(ii)Explain how biological control may contribute to biological evolution through natural selection in an ecosystem.
10. 6(b)(ii)5 marks· Biology Q6 6(b)(ii)Describe 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.
11. 6(b)(iii)3 marks· Biology Q6 6(b)(iii)Explain why the sickle-cell allele is more common in the population, in countries where the severe form of malaria is present.
12. 6(a)2 marks· CSEC Biology · May/June 2021 · Paper 2Outline Darwin's theory of natural selection.
13. 6(b)2 marks· CSEC Biology · May/June 2021 · Paper 2Explain why the development of antibiotic resistance by bacteria is considered to be an example of natural selection.
14. 6(c)2 marks· CSEC Biology · May/June 2021 · Paper 2A farmer wishes to use artificial selection to alter the characteristics of his crops. Suggest two ways in which artificial selection will benefit the farmer.
15. 6(d)(i)3 marks· CSEC Biology · May/June 2021 · Paper 2Suggest three possible reasons for the increase in tail length observed in these iguanas.