The structure labelled VIII in the diagram is responsible for

A. vision

B. involuntary actions

C. speech

D. voluntary action

Which of the following occurs when a person looks at a distant, dim object and then looks
at a much closer, bright object? In each eye, the pupil becomes

A. larger, while the lens becomes thicker

B. larger, while the lens becomes thinner

C. smaller, while the lens becomes thicker

D. smaller while the lens becomes thinner

The following insects undergo incomplete metamorphosis except

A. termite

B. cockroach

C. butterfly

D. locust

The process by which fruits develop without fertilization is called

A. parthenocarpy

B. pathology

C. hermaphroditism

D. layering

Which of the following groups contains only macro-nutrients?

A. phosphorus, nitrogen and molybdenum

B. manganese, copper and zinc

C. boron, sulphur and iron

D. calcium, magnesium and potassium

A solution which contains all the required elements in their correct proportions is known as a

A. culture nutrient

B. growth medium

C. complete culture solution

D. nutrient solution

The deficiency of manganese in plants results in

A. death of shoot

B. leaves turning yellow

C. stunted growth

D. poor root development

Which of the following is not true about a potted plant left in the laboratory for one week without watering?

A. the cells of the plant will be turgid

B. there will be wilting of the plant

C. the leaves are likely to tum yellow

D. plant will not take in enough nutrients

The deficiency of vitamin D and calcium ions in the diet of a human causes

A. anaemia

B. night-blindness

C. kwashiokor

D. rickets

An organism is considered a heterotroph when it

A. feeds on inorganic food

B. feeds on already manufactured food

C. fixes atmospheric nitrogen

D. respires anaerobically