Biology 1991 Waec Past Questions and Answers

Question 16 :

• WAEC 1991

Infective hepatitis is a disease of the

A. Heart
B. Kidney
C. Liver
D. Stomach
E. Pancreas

Question 17 :

• WAEC 1991

The pituitary is regarded as the master gland because

A. It is locatd in the brain
B. Its secretion are the most numerous
C. Its secretion control other endocrine glands
D. It is the biggest endocrine gland
E. It controls the activities of the brain

Question 18 :

• WAEC 1991

Growing radicles of seddlings are

A. Negatively phototropic
B. Positively phototropic
C. Negatively geotropic
D. Negatively hydrotropic
E. Positively phototactic

Question 19 :

• WAEC 1991

Over-secretion of thyroxin is likely to lead to

A. Thinness in body
B. Sluggishness
C. Cretinism in infant
D. Reduced metabolism
E. Dwarfism

Question 20 :

• WAEC 1991

If a germinating seed is attached horizontally on a revolving klinostat, what will be the effect of the seedling after three days? The

A. Plumule will curve vertically upward while the radicle will curve towards the ground
B. Plumule and radicle will not show any curvature
C. Radicle will curve towards the ground while the plumule will not show any curvature
D. Plumule will curve vertically upward while the radicle will not show any curvature
E. Plumule and radicle will curve towards the ground