Waec Biology 1988 Past Questions and Answers

Question 56:

• WAEC 1988

(a) State four modes of nutrition in plants.
(b) Outline the process involved in the light and dark reactions of photosynthesis.
(c) Describe briefly the modifications and the mechanisms associated with the following feeding habits:
(i) filter feeding in mosquito larva; (ii) parasitic feeding in tapeworm.

Question 57:

• WAEC 1988

(a) (i) Define the term population. (ii) List two biotic and abiotic factors each that affect population growth.
(b) What are the effects of food shortage on a population?
(c) Describe two methods each for:
(i) improving crop yield (ii) preserving and storing food. Explain the principle involved in each of the methods described.