Waec Biology 1993 Past Questions and Answers

Question 31:

• WAEC 1993

Which of the following structures are adjusted in focusing the image of a
distant or near object on the retina?

A. I and II
B. II and III
C. III and VII
D. IV and V
E. V and VII

Question 32:

• WAEC 1993

Which of the following best describes a marine habitat? A large body of water A

A. Which has no distinctive colour or taste
B. With high concentration of salt
C. With tittle suspended materials
D. With no water weeds
E. Which sustains no animal life

Question 33:

• WAEC 1993

The following are features of Northern Guinea Savanna except

A. Presence of tall trees with thick bark
B. Bare soil with very few trees
C. Presence of fire-resistant trees
D. Abundant herbivores
E. Predominance of woody trees.

Question 34:

• WAEC 1993

Which of the following explains the term pyramid of numbers?

A. The number of organisms in a trophic level
B. The relationship between plants in different trophic levels
C. The number of saprophytes and parasites in a habitat
D. The number of predators in a habitat
E. Progressive decrease in the number of individuals from lower to higher trophic level

Question 35:

• WAEC 1993

In which of the following processes is carbondioxide not given out?

A. Respiration in plants
B. Decay of organism
C. Burning of organic matter
D. Burning of fuels
E. During photosynthesis.