Biology 1990 Waec Past Questions and Answers

Question 61 :

• WAEC 1990

Which of the following statements is not associated with the theory of natural selection?

A. There is a struggle for existence
B. There is competition among the offsprings
C. The weaker offsprings are eliminated
D. Food and other needs are abundant
E. Nature selects those that survive to reproduce their kind

Question 62 :

• WAEC 1990

(a) Describe briefly the process involved in the breakdown of glucose in the cell of living organisms to produce energy (AT P)
(b) State two conditions under which glycogen can be converted to glucose to produce energy.
(c) Describe an experiment to demonstrate that oxygen is released by green plants during photosynthesis.

Question 63 :

• WAEC 1990

(a) (i) Give two reasons why termites are described as social insects.
(ii) Name four castes found in the termite nest, stating one of each castes.
(b) Describe five behavioural adaptations of termites which enable them to survive in their environment.

Question 64 :

• WAEC 1990

(a) Describe the process of succession in an abandoned farm land.
(b) List seven ways by which micro-organisms can -be controlled to maintain good health.