Jamb Biology 2004 Past Questions and Answers

Question 16:

• JAMB 2004

Yam is used in this set-up because it

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

Question 17:

• JAMB 2004

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

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

Question 18:

• JAMB 2004

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

A. Arterioles
B. Venules
C. Arteries
D. Capillaries

Question 19:

• JAMB 2004

The anaerobic fermentation of a glucose molecule yields

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

Question 20:

• JAMB 2004

The opening of the stoma is controlled by the

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