Waec Biology 1995 Past Questions and Answers

Question 21:

• WAEC 1995

Which of the following is the correct route of transmission of impulses along a reflex arc?

A. Receptor → sensory neurone → synapse → intermediate neurone → synapse → motor neurone → effector
B. Receptor → motor neutron e synapse → intermediate neurone → synapse → sensory neurone effector
C. Receptor → synapse → sensory neurone → intermediate neurone → synapse → effector → motor neurone
D. Effector → motor neurone → synapse → sensory neurone → synapse → intermediate neurone → receptor
E. Effector → intermediate neurone → synapse → motor neurone → synapse → sensory neurone → receptor.

Question 22:

• WAEC 1995

Which of the following statements is false?

A. Human sense of smell is easily fatigued
B. The skin can perceive the sensations of touch, pain, pressure and temperature
C. Taste buds and olfactory cells are active when wet as well as when dry
D. Sensory nerve endings receive stimuli and send to the central nervous system
E. Senses of smell and taste can be weakened by catarrh or blocked nose.

Question 23:

• WAEC 1995

The following are directly involved in transmission of sound waves to the brain except

A. Eardrum
B. Auditory meatus
C. Auditory ossicles
D. Eustachian tube
E. Cochlea

Question 24:

• WAEC 1995

The term syncarpous is used to describe a flower when the carpels are

A. Many and fused
B. Two only
C. Two and separate
D. Many and free
E. Lying at different parts of a flower

Question 25:

• WAEC 1995

Which of the following structures are characteristics of insect pollinated flowers?

A. Dull coloured flowers with no nectar
B. Very light numerous and pendulous stamen
C. Brightly coloured petals, scent nectar
D. Flowers are usually small and inconspicuous
E. Stigma are large, feathery and hang outside the flower