Biology Revision Questions

1.(a) Describe the structure of the heart. (7) Marks)
(b) Describe the events of the cardiac cycle in humans.( 8Marks)
2.(a)Describe the process of digestion in the (2 Marks)
i. Mouth
ii. Stomach
iii. Duodenum
v. Illeum
3.(a)Explain how flowers are adapted to wind pollination. (10 Marks)
(b) Outline the advantages of cross pollination. (5 Marks)
4a) Define the following terms
i. Complete dominance (01 mark)
ii. Co-dominance (01 mark)
b) When pollen grains from a red flowered plant were dusted on the flowers of the white flowered plant, a pink flowered plant was obtained.
i) Using suitable genetic symbols show how the pink flowered plant can to be obtained. (07 marks)
ii) What will be the genotypes and phenotypes of a cross between a pink flowered plant and white flowered plant? Show your working. (06 marks)