Waec Biology Past Questions and Answers

Question 266:

• WAEC 1993

When an axon is at rest, the concentration of ions on either side of the membrane are different. Which of the following is correct about the concentrations ions on either side of the membrane?

A. There is an excess of potassium ions inside the axon and an excess of sodium ions outside
B. The inside of the axon becomes positively charged while the outside is negatively charged
C. There is an excess of sodium ions on the inner side of the axon
D. Chloride and potassium ions begin to move across the membrane
E. Calcium ions accumulate on the inner side of the axon

Question 267:

• WAEC 1993

The groups of sensory cells found on the upper surface of the tongue are called

A. Ampullae
B. Taste bud
C. Nerve cells
D. Somatic cells
E. Tactile cells

Question 268:

• WAEC 1993

Which type of eye defect IS illustrated in the diagram above?

A. Hypermetropia
B. Myopia
C. Cataract
D. Astigmatism
E. Glaucoma

Question 269:

• WAEC 1993

This defect can be corrected by the use of

A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Surgical operation
E. Biconcave lens

Question 270:

• WAEC 1993

Which of the following is not a courtship behaviour exhibited of animals?

A. Pairing
B. Display
C. Seasonal migration
D. Hibernation
E. Territorialism.