The importance of practising crop rotation in agriculture is to

A. maintain soil fertility

B. improve the nutritional value of crops

C. control soil erosion

D. ensure the growth of crops

The recycling method of solid waste disposal is unsuitable for

A. organic matter

B. glass

C. plastic

D. metal scraps

A non - renewable alternative source of energy is

A. wind generator

B. solar panels

C. nuclear energy

D. hydroelectric power

Which of the following is the best explanation for a child who is phenotypically short and born of two tall parents

A. The father possesses a gene for shortness

B. The mother posesses a gene for shortness

C. Nature makes the child short

D. Both parents possess gene for shortness

A yellow maize is crossed with a white maize and the first filial generation produce yellow maize only. The white trait is said to exhibit

A. dominance

B. recessiveness

C. codominance

D. incomplete dominance

The association in which one member benefits and the other is relatively unaffected by the interaction is termed

A. symbiosis

B. parasitism

C. commensalism

D. mutualism

When a peacock displays its colourful feathers, it is

A. ready for a fight

B. protecting itself from predators

C. protecting its mate from predators

D. courting a female

When an animal has a dark-coloured dorsal surface and a light-colouration ventral surface, this is an adaptation called

A. concealment colouration

B. countershading

C. colour blending

D. disruptive colouration

The only caste in the termite colony are the members can feed themselves are the

A. reproductives

B. workers

C. nymphs

D. soldiers

An evidence of a common ancestral for fishes, amphibians, reptiles, birds and mammals is the

A. possession of wings by birds and bats

B. cold-bloodedness of fishes, amphibians and reptile

C. presence of gilll clefts in vertebrate embryos

D. possession of scale by fish and reptiles