Waec Biology 2007 Past Questions and Answers

Question 61:

• WAEC 2007

A termite with a relatively large head and powerful jaws is likely to be a

A. King
B. Queen
C. Soldier
D. Reproductive

Question 62:

• WAEC 2007

(a) In a tabular form distinguish between tropic movement and nastic movement
(b) Explain how light brings about tropic movement in the stem and root of a flowering plant.
(c) What would be observed when a growing seedling is placed horizontally?
(d) State five functions of the pituitary gland
(e) State two difference between growth in plants and growth in animals.

Question 63:

• WAEC 2007

(a) What is a balanced diet?
(b) Name the classes of food stating the importance of any two to the human diet.
(c) In a tabular form, state the source, substrate and end products of the following enzymes: (i) ptyalin: (ii) pepsin; (iii) lipase.

Question 64:

• WAEC 2007

(a) Define the following terms:
(i) gene
(ii) gene mutation.
(b) Name two structures each of plants and animals where the following processes take place:
(i) mitosis
(ii) meiosis.
(c) State four advantages a farmer may hope to derive in cross breeding two different breeds of cows.
(d) State three applications of the knowledge of genetics in medicine.

Question 65:

• WAEC 2007

(a) (i) What is pollution?
(ii) State four pollutants of water
(b) Describe the effects of each of the pollutants named on aquatic organisms.