Waec Biology 1990 Past Questions and Answers

Question 36:

• WAEC 1990

The organ located in the mammalian abdominal cavity just below the diaphragm
and lying on top of the stomach is the

A. Bladder
B. Intestine
C. Liver
D. Pancreas
E. Chorion

Question 37:

• WAEC 1990

Which of the following is the effect of using artificial pollination in plant breeding?

A. Production of healthy crops
B. Improvement of the variety of crops
C. Making crops susceptible to diseases
D. Lengthening the maturity time of crops
E. Encouraging competition amongst crops

Question 38:

• WAEC 1990

A dry indehiscent fruit containing one seed and possessing a hairy pappus is described as

A. A nut
B. A drupe
C. A cypsela
D. A follicle
E. An achene

Question 39:

• WAEC 1990

Thunderstorm can be beneficial to plants because it

A. Kills the pest that attacks crops
B. Destroys some of the major crops
C. Adds nitrates to the soil
D. Adds lime to the soil
E. Makes rain water available to plants

Question 40:

• WAEC 1990

Which of the following is a nitrifying bacterium

A. Nitrobacter
B. Rhizobium
C. Azotobacter
D. Clostribium
E. Nitrosomonas