JAMB Biology 2000 past questions

An association between the root nodule of a leguminous plants and rhizobium sp is known as

Amphibians are normally found

Viviparity occurs mainly in the

In which part of the human body does the secretion of the growth hormone occur?

The parts labelled I and II make up the

In mammals, re-absorption of salt takes place in

The part of the brain that controls body posture in mammals is the

Peripheral arrangement of vascular tissues in dicots is a characteristic of the internal structure of the

The substance labelled II originates from

The gas occupying the space labelled I is

The scapula and the ischium are part of the

Bacteria in the large intestine of man are important in the

Short-sightedness can be corrected by lenses which are

The inner ear contains two main organs, namely, the

For growth to occur in organisms, the rate of

The production of violet colouration, when dilute Na0H solution is added to a solution of food substance, followed by drops of 1 % CUSO4 solution while making indicates the presence of

The greatest amount of energy will be obtained by the oxidation of 100kg of

The chamber of the mammalian heart with the thickest wall is the

Serum differs from blood plasma because it.

The part labelled II is the

The fruit represented is mainly dispersed by

In an experiment to estimate the volume of air in a soil sample using a measuring cylinder, it was found that: Initial volume of water = p cm3 Volume of soil before mixing with water = q cm 3 Final volume of water after adding soil=r cm3. From the data above, which of the following deductions is correct?

An ecological succession often leads to

Atmospheric nitrogen is converted to soil nitrogen for plant use by

I High birth rate and high immigration rate II Low birth rate and high immigration rate III Low mortality rate and low emigration rate IV High mortality rate and high emigration rate. Which combination of the above can cause rapid overcrowding in climaxbiotic communities and human settlements?

The soil becomes toxic to plants when the concentration of its essential elements is in the range labelled

The range at which soil essential element concentration is recorded for optimal plant growth is marked

Which of the following growth activities in plants is brought about by gibberellins?

Which of the following are adaptations of animals to aquatic habitats?

Which of the following is an adaptation of forest species?

In a food chain, each succeeding level in a forward direction, represent?

The disaster that would have the least destructive impact on animal life and balance in nature is

The legs and beak of an egret resemble those of the heron because they

The factors that determine the distribution of vegetable zones are

The pollutants that contribute to the depletion of the ozone layer in the atmosphere are

The surest way to combine the best qualities of both parents and the offspring is by

Blood grouping in human beings is derived from combination of

The older fossil-bearing rocks, in contras to the more recent ones, are more likely to contain

In a group of male Agama lizards, the one brightest head colour is the

Examples of water-borne and sex-linked disease are

The mutation theory of organic evolution was propounded by

Complex social behaviou and organization are found mostly in

Which of the following structural features are adapted for uses other than water conservation?