A technique of micropropagation is  
1. Somatic hybridization  
2. Somatic embryogenesis
3. Protoplast fusion
4. Embryo rescue 

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called         
1. Ley farming
2. Contour farming
3. Strip farming
4. Shifting agriculture 

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?    
1. Mangur
2. Mrigala
3. Mackerel
4. Mystus 

Pollen grains can be stored for several years in liquid nitrogen having a temperature of        
1. - 196$°$C
2. - 80$°$C
3. - 120$°$C
4. - 160$°$C 

To obtain virus - free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken ?
1. Apical meristem only
2. Palisade parenchyma
3. Both apical and axillary meristems
4. Epidermis only

Which of the following enhances or induces fusion of protoplasts?
1. Polyethylene glycol and sodium nitrate
2. IAA and kinetin
3. IAA and gibberellins
4. Sodium chloride and potassium chloride

Which part of the tobacco plant is infected by Meloidogyne incognita?
1. Root
2. Flower
3. Leaf
4. Stem

A true breeding plant is:

Interspecific hybridization is the mating of
1. more closely related individuals within same breed for 4-6 generations
2. animals within same breed without having common ancestors
3. two different related species
4. superior males and females of different breeds

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.