Jamb Biology 1989 Past Questions and Answers

Question 21:

• JAMB 1989

The lumbar vertebra when compared with a thoracic vertebra has a

A. Longer neural spines
B. Wider neural canal
C. Thicker centrum
D. Shorter transverse process

Question 22:

• JAMB 1989

Wind pollinated flowers usually have

A. Rough pollen grains
B. Sticky stigmas
C. Small and short stigmas
D. Long styles

Question 23:

• JAMB 1989

The components of castor oil seed and the maize grain are similar EXCEPT for the

A. Number of cotyledons
B. Location of the embryo
C. Number of radicles
D. Number of plumules

Question 24:

• JAMB 1989

A corn differs from a bulb in that

A. Its stem is the main food storage organ
B. It has a flattened discshaped stem
C. Buds are absent in the axils of the leaves
D. Adventitious roots are present

Question 25:

• JAMB 1989

Exponential increase in the population of an organism is a characteristic feature off

A. Binary fission
B. Sexual reproduction
C. Budding
D. Vegetative propagation