Internal structure of a flowering plant - Jamb Biology Past Questions and Answers

Question 56:

• JAMB 1991

A collection of achenes formed from several carpels of a flower is

A. A multiple fruit
B. An aggregate fruit
C. A shizocarp
D. A simple fruit

Question 57:

• JAMB 1991

Which of the following is likely to occur in a deciduous forest during the dry season?

A. New leaves are formed
B. The trees die off
C. The undergrowth increases
D. The ground becomes bare

Question 58:

• JAMB 1992

The flowering period of plants in a habitat is determined by the

A. Duration of sunlight
B. Intensity and duration of rainfall
C. Relative humidity of the atmosphere
D. Temperature of the habitat

Question 59:

• 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 60:

• JAMB 1992

Pawpaw seeds collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable character as the parent because

A. Seeds are not reliable for propagating plants
B. Uncontrolled out-crossing can introduced unwanted variability
C. Vegetative propagation is best form of reproduction of all crop
D. Seeds were not physiologically mature at the harvest