Waec Biology Past Questions and Answers

Question 221:

• WAEC 1992

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 222:

• WAEC 1992

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

Question 223:

• WAEC 1992

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

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

Question 224:

• WAEC 1992

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 225:

• WAEC 1992

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