Which of the following diseases is caused by deficiency of insulin in the body?

• A. Malaria
• B.Diabetes mellitus
• C. Hepatitis
• D. Gonorrhoea

Legumes incorporate nitrogen gas into their proteins because

• A. of the presence of Azotobacter in their roots
• B. they possess root nodules containing Rhizobium
• C. they have a well developed root system
• D. they are autotrophic

The digestion of proteins starts in the______

• A. small intestine
• B. stomach
• C. large intestine
• D. mouth

A pupil accidentally watered a potted plant with concentrated salt solution after sometime the plant began to wilt.

The wilting of the plant is due to the fact that

• A. the root hair die off and can no longer absorb water
• B. the salt solution causes faster rate of transpiration leading to the death of the plant cell
• C. the salt solution has caused water lost from the plant cell leading to loss of turgor
• D. the plant tissue has been poisoned by the salt which is absorbed by the plant

In which of the following groups of vertebrates is parental care mostly exhibited ?

• A. Reptilia
• B. Amphibia
• C. Aves
• D. Mammalia

The response shown by the tips of the root and shoot of a plant to the stimulus of gravity is

• A. haptotropism
• B. phototropism
• C. hydrotropism
• D. geotropism

The part of the ear which contains nerve cells sensitive to sound vibrations is the

• A. cochlea
• B. ampulla
• C. tympanum
• D. malleus

A freshwater plant such as water lily can solve the problem of buoyancy by the possession of?

• A. aerenchyma tissues
• B. dissected leaves
• C. thin cell walls of the epidermis
• D. water-repelling epidermis

A constituent of the exhaust fumes from electricity generating sets which causes serious pollution is

• A. Carbon (II) Oxide
• B. Water Vapour
• C. Ozone
• D. Carbon (IV) Oxide

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

• A. New leaves are formed
• B. The trees die off
• C. The undergrowth increases
• D. The ground becomes bare