WAEC Biology Past Questions And Answers - Biology

Waec Biology Questions

Question 211:

WAEC 1992

Which of the following is a structures functions as an excretory system found in flatworm?

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A Contractile vacuole
B Nephridium
C Flame cell
D Malpighiam tubule
E Kidney

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Question 212:

WAEC 1992

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 of ions on either side of the membrane?

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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 acrossthe membrane
E Calcium ions accumulate on the upper side of the axon

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Question 213:

WAEC 1992

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

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