Jamb Biology 1993 Past Questions and Answers

Question 21:

• JAMB 1993

Which of the following is the correct order of the vertebrae along the spinal column?

A. Axis → atlas → thoracic → lumbar → cervical → sacral
B. Atlas → cervical → axis → thoracic → lumbar→ sacral
C. Atlas → axis → cervical → thoracic → lumbar → sacral
D. Axis → atlas → cervical → thoracic → sacral → lumbar

Question 22:

• JAMB 1993

Which of the following is TRUE of the process of conjugation in paramecium?

A. Micronucleus disintegrates
B. Each ex-conjugant divides only once
C. Macronucleus undergoes division
D. Each micronucleus divides twice

Question 23:

• JAMB 1993

The bright colours of the comb and feathers in the peacock are for

A. Sex differenciation
B. Beauty
C. Courtship
D. Defence

Question 24:

• JAMB 1993

The main function of the petal of a flower is to

A. Attract pollination agents
B. Protect the flower while still in bud
C. Serve as landing stage for insects
D. Protect the inner paisr from desiccation

Question 25:

• JAMB 1993

In the mammal, the autonomic nervous system consists of

A. Sympathetic and parasympathetic system
B. Brain and spinal nerves
C. Brain and cranial nerves
D. Spinal cord and spinal nerves