10. Explain continental drift as an evidenceof evolution ( 3 marks)

11. (a) What is a test- cross? ( 2 marks)

(b) Give a reason why organisms become resistant to drugs ( 1 mark)

12. Distinguish between the following terms

(a) Homologous structures

(b) Analogous structures ( 4 marks)

13. (a) What is meant by natural selection?

(b) Explain the role played by mutation in evolution ( 5 marks)

14. Define the following terms

(a) Hybrid

(b) Hybrid vigour

15. The peppered moth exists in two varieties, which are genetically controlled. The dark variety is found predominantly in industrial cities and the white variety is found predominantly in rural areas. Explain how this pattern of distribution supports the theory of evolution by natural selection ( 6 marks)

16. Explain what is meant by the followingconcepts

(a) Special creation (2 marks)

(b) Organic evolution (2 marks)