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

Carbon is added to the atmosphere by the following processes except

A. respiration

B. burning

C. photosynthesis

D. volcanic eruption

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

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

A. aestivation

B. dormancy

C. burrowing

D. incubation

Which of the following factors may not affect living organisms in an aquatic habitat?

A. Turbidity

B. Temperature

C. Humidity

D. Light

Which of the following parasites is a flatworm?

A. Plasmodium

B. Trypanosoma

C. Ascaris

D. Schistosoma

During prolonged exercises, glucose in the muscle is convened to

A. pyruvic acid

B. lactic acid

C. co- enzyme

D. ethanol

Which of the following is an effect of carbon monoxide on man?

A. irritating the skin

B. Reducing oxygen carrying capacity of blood

C. Causing gene mutation

D. Destroying white blood cells.

Which of the following is a renewable natural resources?

A. Air

B. Timber

C. Soil

D. Mineral

Which of the following resources is competed for by organisms in the desert?

A. Light

B. Temperature

C. Oxygen

D. Water