The principal nitrogenous excretory compound in humans is synthesised:
1. in kidneys but eliminated mostly through liver
2. in kidneys as well as eliminated by kidneys
3. in liver and also eliminated by the same through bile
4. in the liver, but eliminated mostly through kidneys

Carrier ions like Na+ facilitate the absorption of substances like:

1. amino acids and glucose

2. glucose and fatty acids

3. fatty acids and glycerol

4. fructose and some amino acids

Which one of the following symbols and its representation, used in the human pedigree analysis is correct?

1.	= Mating between relatives
2.	= Unaffected male
3.	= Unaffected female
4.	= male affected

Which two of the following changes (a – d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)?
 

Changes occurring are:
1. (b) and (c)
2. (c) and (d)
3. (a) and (d)
4. (a) and (b)

Toxic agents present in food which interfere with thyroxin synthesis lead to the development of:

1. toxic goitre

2. cretinism

3. simple goitre

4. thyrotoxicosis

If for some reason our goblet cells are non-functional, this will adversely affect:

1. production of somatostatin

2. secretion of sebum from the sebaceous glands

3. maturation of sperms

4. smooth movement of food down the intestine

The plasma membrane consists mainly of:

Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

The first movements of the foetus and the appearance of hair on its head are usually observed during which month of pregnancy?

1. Fourth month

2. Fifth month

3. Sixth month

4. Third month

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?
1. Cotyledon
2. Endosperm
3. Aleurone layer
4. Plumule