Ecology simply means the study of

A. the properties of a habitat

B. interrelationship between organisms and their environment

C. several species of plants and animals

D. interrelationship between plants and animals.

Which of the following processes removes water from the water cycle?

A. Condensation

B. Perspiration

C. Photosynthesis

D. Transpiration

The importance of practising crop-rotation in agriculture is to

A. control soil erosion

B. maintain the fertility of the soil

C. improve the nutritional value of crops

D. ensure growth of cash crops

In any food chain, the first member must be a

A. carnivore

B. herbivore

C. zooplankton

D. autotroph

Which of the following measures is most likely to cause a damage to the ecosystem in the control of pests
and weeds?

A. Use of ladybird insects to feed on aphids

B. introduction of bacterium to kill larvae of butterfly

C. Introduction of Tilapia fish in ponds to feed on mosquito larvae

D. Spraying insecticides to destroy cotton- stainers in a cotton-field

The total amount of energy entering a food chain is that which is present in the

A. consumer

B. ecosystem

C. producer

D. decomposer

Which of the following terms ensures the survival of an organism in its environment?

A. Hibernation

B. Succession

C. Adaptation

D. Competition

The concave shape of a birds wing during flight, ensures that the greater air pressure under the wings will

A. counteract the effect of gravity

B. lift the bird so that it can remain airborne

C. enable the pectoral ,muscles to contract easily

D. change the direction of the flying bird

The possession of breathing roots is a characteristic of plants growing in

A. mangrove swamp

B. coastal savanna

C. guinea savanna

D. shrub biome

The numbers in a population would rise, if there was an increase in the

A. spread of disease

B. number of deaths

C. number of predators

D. amount of food available