Waec Biology 1990 Past Questions and Answers

Question 26:

• WAEC 1990

The condition known as cretinism is caused by the deficiency of

A. Adrenalin
B. Vitamin A
C. Insulin
D. Thyroxin
E. Vitamin C

Question 27:

• WAEC 1990

Which of the following parts of the mammalian brain is involved in taking the decision to run rather than
walk?

A. Cerebellum
B. Medulla oblongata
C. Cranial nerves
D. Mid brain
E. Cerebrum

Question 28:

• WAEC 1990

The brain and spinal cord make up the

A. Peripheral nervous system
B. Automatic nervous system
C. Central nervous-system
D. Somatic nervous system
E. Sympathetic nervous system

Question 29:

• WAEC 1990

Which of the following is not true about auxins? They

A. Are manufactured by plants
B. Are used in the site of production
C. Are normally present in minute quantities in the cells of plants
D. Regulate growth rate of plants
E. Regulate direction of growth in plants

Question 30:

• WAEC 1990

Which of the following stimuli are not perceived through the skin of mammals?

A. Light
B. Pressure
C. Pain
D. Heat
E. Cold