Interspecific hybridisation is the mating of

1.  animals within the same breed without having common ancestors

2.  two different related species

3.  superior males and females of different breeds

4.  more closely related individuals within the same breed for 4-6 generations

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?

1.  Mystus

2.  Mangur

3.  Mrigala

4.  Mackerel

Homozygous purelines in cattle can be obtained by:

1. Mating of unrelated individuals of same breed.

2. Mating of individuals of different breed.

3. Mating of individuals of different species.

4. Mating of related individuals of same breed.

A system of rotating crops with legume or grass pasture to improve soil structure and

fertility is called

1. contour farming

2. strip farming

3. shifting agriculture

4. ley farming

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?

(1) Mystus

(2) Mangur

(3) Mrigala

(4) Mackerel

Interspecific hybridisation is the mating of

(1) animals within same breed without having common ancestors

(2) two different related species

(3) superior males and females of different breeds

(4) more closely related individuals within same breed for 4-6 generations

Homozygous purelines in cattle can be obtained by

(1) mating of related individuals of same breed

(2) mating of unrelated individuals of same breed

(3) mating of individuals of different breed

(4) mating of individuals of different species