JAMB Biology 1991 Past Questions

Which of the following structure is associated with aerobic respiration?

The structure labelled 5 is used for

Angiosperms and gymnosperms belong to the plants group known as

Which of the following are non-green plants?

Sting cells are normally found in

Which of the following are differentiated into true roots, stems and leaves

To facilitate gaseous exchange, breathing roots have

The annulus of fern sporangium helps in

One of the features which adapts Paramecium to its environment is the possession of

In the earthworm, the cocoon is secreted by the

The function of maxillipeds in crayfish is to aid

The respiratory organ in the land snail is the

The gill rakers of fishes take part in

A wide pith with a ring of conducting tissue is characteristic of the root of

Which of the following is formed immediately after the first product of photosynthesis?

One of the accessory organs of the digestive system is the

The element common to protein carbohydrate and lipid is

The crown of the mammalian tooth is covered with

In the living cells, insufficient oxygen may cause a breakdown of glucose into

Which of the following can bring about the greatest increase in the rate of transpiration?

After 30 minutes, the level of sugar solution in the above figure will

The process by which water moves from X to Y through the semi-permeable membrane is called

Fibrinogen and prothrombin play important roles in the

Deoxygenation blood flows into the right and left lungs through the

Which of the following is a plant excretory product?

The movement of the whole organism to an external stimulus is termed

Which of the following vertebrae lacks a centrum?

The function of the epididymis in mammals is the

A collection of achenes formed from several carpels of a flower is

Vegetation propagation is described as asexual reproduction because

Epigeal germination can be found in

A dwarf plant can be stimulated to grow to normal height by the application of

The greatest contribution to genetic studies was made by

The exchange of genes between homologous chromosomes is called

When two heterozygotes mate, the dominant trait will appear in

Which of the following characters is NOT sex-linked?

The most important factors which influence an organism's way of life in its habitat are

Organisms in an ecosystem are usually grouped according to their trophic level as

The above diagram represents a competitive interaction between organism in communities I and II. Which of the following statements is CORRECT?

A food web is more stable than a food chain because

Which of the following is likely to occur in a deciduous forest during the dry season?

Which of these is NOT an adaptive features for arboreal life?

Which of the following diseases can be prevented by innoculation?

Sources of air pollutants are

Fertilizers are lost from the soil through

Nitrogen- fixing micro-organisms in leguminous plants live symbiotically in the

The structure labelled 4 is for

As the tadpole develops, the structure labelled 5

In the digestive system, absorption of nutrient into the blood takes place in the part labelled

The gland which produces trypsin, amylase and lipase is labelled