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Biology Past Questions and Answers

Jamb Biology Questions

Question 16:

Yam is used in this set-up because it

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A Is a permeable to the salt solution
B Is a plant material
C Acts as a storage organ
D Acts as a semi-permeable membrane

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Question 17:

Which of the following results is to be expected if the set up is left for several hours?

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A Decrease in the size of the yam
B Movement of the salt solution into the water
C Decrease in the volume of water inside the yam
D Movement of water from the salt solution into the yam

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Question 18:

The surface of an alveolus in a mammal is well supplied with tiny blood vessels known as

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A Arterioles
B Venules
C Arteries
D Capillaries

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Question 19:

The anaerobic fermentation of a glucose molecule yields

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A 38 ATP molecules
B 2 ATP molecules and alcohol
C Pyruvic acid and alcohol
D Water and carbon (IV) oxide

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Question 20:

The opening of the stoma is controlled by the

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A Presence of a pore
B Increase in solute concentration in the guard cells
C Presence of guard cells
D Decrease in solute concentration in the guard cells

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