JAMB Biology 1990 Past Questions

Viruses are considered to be living organisms because they

Which of the following characteristics is common to Amoeba and Paramecium?

Hydra removes undigested food by

Which of the following groups of invertebrates reproduces by budding?

The algae, bryophytes and pteridophytes are similar in that they

The spores of ferns are dispersed by

The part labelled 3 is the

Which part of the twig produces auxins?

Which of the following animals has homodont dentition?

In which of the following does external fertilization takes place?

In the tapeworm the suckers on the scolex are used for

A feature which adapts birds to flight is the possession of

The nephridia in the earthworm form part of the

which of the following disease is rarely spread by a housefly?

Which type of the following cells is thin-walled and living at maturity?

The mode of nutrition in which digestion is extracellular is

The first step in the process of photosynthesis is the

Which of the following food substance will produce a brick-red colour when warmed with Benedict's solution?

The organ which secretes digestive enzymes as well as hormones is the

The vilius in the small intestine is significant because it

If a ring of bark and phloem is removed from a stem, the

Transpiration can be measured with a

Excretory products responsible for the red, purple and blue colours of flowers are called

Etiolation is caused by the influence of

Muscles are indirectly attached to bones by means of

During mammalian embryo development, large amounts of oestrogen and progesterone are produced in the

Fruits which develop without fertilization are described as

The type of placentation shown in the figure above is a

The elephant grass is propagated vegetatively by means of

The part of the ear that is concerned with balance is the

In organism where the 2nd number of chromosomes is 16, the number of chromosomes in each gamete will be

What will be the result of the first filial generation (F₁) and the second filial generation (F₂) of a mono-hybrid cross between pure line normal-winged Drosophilia flies and pure line short-winged flies, if the gene for the normal wing is dominant?

What stage during cell division is represented in the figure above?

An individual in the AB blood group is a universal recipient for blood donation because

Haemophilia results from the mutation of the genes

In a savanna ecosystem the abiotic factors include

Which of the following is an omnivore?

which of the organisms will have the lowest population in an ecosystem?

The salinity of a brackish enviroment

Physiological adaptation to very dry condition in animals is called

Which set of disease is spread mainly by insect vectors?

Which of the following constitute pollution?

An acidic soil can be improved upon by

What do bacteria in root nodules derive from the host plant?

Free nitrogen is released to the atmosphere by

Which structure is the glomerulus?

If the blood is too concentrated, more water is absorbed from

All the cell bodies in the spinal cord are found in

In a reflex action, impulse flows from

In a saprophyte, sex organs are produced in the