The bacterium Bacillus thuringiensis is widely used in contemporary biology as a/an:

1. indicator of water pollution

2. insecticide

3. agent for production of dairy products

4. source of industrial enzyme

Chipko movement was launched for the protection of:

1. grasslands

2. forests

3. livestock

4. wet lands

A health disorder that results from the deficiency of thyroxin in adults and characterized by-
(i) a low metabolic rate 
(ii) increase in body weight 
(iii) tendency to retain water in tissues is:

1. hypothyroidism

2. simple goitre

3. myxoedema

4. cretinism

Elbow joint is an example of:

1. Pivot joint

2. Hinge joint

3. Glinding joint

4. ball and socket joint

The correct sequence of plants in a Hydrosphere is:

Mannitol is the stored food in:
1. Chara
2. Porphyra
3. Fucus
4. Gracillaria

The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is:
1. cuboidal
2. glandular
3. ciliated
4. squamous

Which one of the following pair of food components in humans reaches the stomach totally undigested?

1. Protein and starch

2. Starch and fat

3. Fat and cellulose

4. Starch and cellulose

Uric acid is the chief nitrogenous component of the excretory products of:

1. man 

2. earthworm

3. cockroach

4. frog

Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

1. Coelenterates (cnidarians)

2. Ascheminthes (roundworms)

3. Ctenophores

4. Sponges