Jamb Biology 1980 Past Questions and Answers

Question 26:

• JAMB 1980

The filament of spirogyra were put into equal volumes of sugar solutions X and Y. After 5 minutes, filaments from solution X had their cells contents rounded up while those from Y were unaffected. The experiment shows that

A. Solution X was stronger than Y
B. Solution Y was stronger than X
C. Spirogyra used up the sugar in solution X
D. Solution X is good for stimulating sexual reproduction in Spirogyra
E. Solution Y was less contaminated than X

Question 27:

• JAMB 1980

which part of the human brain is concerned with reflexes controlling the rate of heart beat and breathing?

A. Medulla
B. Cerebrum
C. Cerebellum
D. Pineal body
E. Olfactory lobe

Question 28:

• JAMB 1980

Which of the following hormones is produced during fright or when agitated?

A. Insulin
B. Adrenalin
C. Thyroxine
D. Pituitrin
E. Progesterone

Question 29:

• JAMB 1980

The following are connected with the movement of a reflex action (1) Central nervous (2) Muscles (3) Skin (4) Sensory nerve (5) Motor nerve. Which of the following sequences indicates a correct path?

A. 1-2-3-4-5
B. 2-1-4-5-3
C. 3-4-1-2-5
D. 4-1-5-2-3
E. 3-4-1-5-2

Question 30:

• JAMB 1980

Biconcave lenses are used in the correction of an eye defect called?

A. Myopia
B. Colour blindnes
C. Old age
D. Hypermetropia
E. Weakening of ciliary muscles