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

The stage in the life history of a moth responsible for the destruction of agricultural crops is the

• A. nymph
• B. imago
• C. pupa
• D. caterpillar

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

Which of the following is likely to have a higher concentration of the mitochondria?

• A. Sperm cell
• B. white blood cell
• C. Egg cell
• D. Red blood cell

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

• A. reproductives
• B. workers
• C. nymphs
• D. soldiers

which of the following is used to test for the presence of lime in a soil sample?

• A. H2SO4(aq)
• B. NaOH(aq)
• C. HCl(aq)
• D. HNO3(aq)

The mammalian lung is made air tight by the

• A. pleural cavity
• B. mucous membrane
• C. pleural membrane
• D. diaphragm

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

Which of the following is a homostatic response in humans?

• A. Withdrawing the hand from a hot object
• B. The mouth getting watery when food is sighted
• C. yawning owing to tiredness
• D. shivering in a cold environment