Question 756:

• JAMB 1992

An onion is a bulb because it

A. Has a tuberous stem
B. Has a reduced stem and thick fleshy leaves
C. Has adventitous roots
D. Bears many buds at the nodes

Question 757:

• JAMB 1992

The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the

A. Stomata
B. Lenticels
C. Air space
D. Guard cell

Question 758:

• JAMB 1992

Fungi are heterotropic because they

A. Have no leaves
B. Lack roots
C. Are filamentous
D. Lack chlorophyll

Question 759:

• JAMB 1992

The major site of photosynthesis in the leaf is the

A. Palisade parenchyma
B. Mesophyll parenchyma
C. Upper epidermis
D. Lower epidermis

Question 760:

• JAMB 1992

5 cm³ dilute sodium hydroxide solution and 5 cm³ one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of

A. Glucose
B. Starch
C. Fat
D. Protein