Waec Biology 1993 Past Questions and Answers

Question 36:

• WAEC 1993

Sea water taken in by a living organism can be recycled into the atmosphere through all the following
processes except

A. Transpiration
B. Digestion
C. Excretion
D. Respiration
E. Decay

Question 37:

• WAEC 1993

Which of the following water pollutant may contain organisms that cause dysentery?

A. Pesticides
B. Sewage
C. Industrial wastes
D. Fertilizers
E. Crude oil.

Question 38:

• WAEC 1993

Which of the following is not an adaptation of plants or animals to desert environment?

A. Well developed tap root system
B. Small leaves with thick Epidermis
C. Stems with spike-like leaves
D. Metabolic waste in the form of uric acid in some animals
E. Broad leaves for storage

Question 39:

• WAEC 1993

A climax community is characterised by

A. A stable composition of plant and animal species
B. Rapid changes in the composition of species
C. Constant changes in appearance of the habitat
D. Different species occurring at different times
E. Gradual change in animal population

Question 40:

• WAEC 1993

Which of the following is not a characteristic of overcrowding in plant and animal community?

A. Population outstripping available space
B. Population exceeding available food
C. Competition within the population
D. Increase in primary production
E. Population increasing at the same rate as the birth rate