Waec Biology Past Questions and Answers

Question 606:

• WAEC 1999

Soil factors in an ecosystem are referred to as

A. Topographic
B. Climatic
C. Biotic
D. Edaphic

Question 607:

• WAEC 1999

A known weight of soil sample was oven-dried to obtain a constant weight. The loss in weight was due to
loss of

A. Organic matter only
B. Water only
C. Water and organic matter
D. Inorganic matter and water

Question 608:

• WAEC 1999

Carbon is added to the atmosphere by the following processes except

A. Respiration
B. Burning
C. Photosynthesis
D. Volcanic eruption

Question 609:

• WAEC 1999

Which of the following is a means of measuring primary production?

A. Rate of reproduction of animals
B. Life span of an organism
C. Number of predators in an environment
D. Harvested plants in a unit area

Question 610:

• WAEC 1999

A situation whereby some mammals remain inactive throughout dry and hot seasons is known as

A. Aestivation
B. Dormancy
C. Burrowing
D. Incubation