Waec Biology 2002 Past Questions and Answers

Question 16:

• WAEC 2002

Which of the following does not occur during inhalation in mammals?

A. Rib cage is raised up
B. Diaphragm contracts and becomes dome shaped
C. Inter-coastal muscle contracts
D. Volume of the thoracic cavity increases.

Question 17:

• WAEC 2002

The oxygen released during photosynthesis is obtained

A. From the catalytic splitting of carbon-dioxide in plant tissues
B. From the breakdown of glucose molecules in cells
C. During the photolysis of water using energy trapped in chlorophyll
D. By the excretion of excess oxygen in plant tissues

Question 18:

• WAEC 2002

In which of the following processes in mammals is liquid passed from blood capillaries to Bowman‘s capsule?

A. Filtration
B. Diffusion
C. Osmosis
D. Reabsorption

Question 19:

• WAEC 2002

Adrenalin is considered as a hormone for “fright and flight” because it

A. Controls the fluid content of the body
B. Is used in protein metabolism
C. Plays a role in the pH balance of the body fluids
D. Prepares the body for action.

Question 20:

• WAEC 2002

Which of the following organs in humans is responsible for the removal of excess water?

A. The spleen
B. The kidney
C. Large intestine
D. Small intestine