Explain in brief the role of animal husbandry in human welfare.

2

(a)

Discuss the role of fishery in enhancement of food production

2

(a)

Mention the factors responsible for the success of Green Revolution.

2

(a)

The steps in a programme are:
Collection of germplasm
Crossbreeding the selected parents
Testing, releasing and marking new cultivars.
(i) What is this programme related to?
(ii) Name two special qualities as basis of selection of the progeny
(iv) What is the popular term given to this outcome? Also name the indian scientist who is credited with chalking out of this programme.

2

(a)

What is meant by germplasm collection? Why is it necessary?

2

(a)

'Give me a living cell of any plant and I will give you a thousand plants of the same'.Is this only a slogan or is it scientfically possible?Write your comments and justify them.

2

(a)

Suggest two features of plants that will prevent insect and pest infestation.

2

(a)

Discuss the average daily feed of a cow.

2

(a)

Name any two Indian breeds of:
(i) Cows and
(ii) Buffaloes.

2

(a)

How can healthy potato plants be obtained from a desired potato variety which is viral infected? Explain.

2

(a)

Success rate of artificial insemination in cattle is fairly is fairly low. Identify any other technique to improve the successful production of hybrids. State two advantages of this technique.

2

(a)

"Large scale cultivation of Spirulina is highly advantageous for human population." Explain giving two reasons.

2

(a)

What role is played by heterozygosity in the improvement of breeds?

2

(a)

How micro-propagation is helpful in producing thousands of plant?

2

(a)