Homozygous purelines in cattle can be obtained by

(a) mating of related individuals of same breed

(b) mating of unrelated individuals of same breed

(c) mating of individuals of different breed

(d) mating of individuals of different species

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Interspecific hybridisation is the mating of

(a) animals within same breed without having common ancestors

(b) two different related species

(c) superior males and females of different breeds

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

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

(a) Mystus

(b) Mangur

(c) Mrigala

(d) Mackerel

Concept Questions :-

Animal Husbandry
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A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called
(a) contour farming
(b) strip farming
(c) shifting agriculture
(d) ley farming

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Outbreeding is an important stategy of animal husbandry because it
(a) help in accumulation of superior genes
(b) is useful in producing purelines of animals
(c) is useful in overcoming inbreeding depression 
(d) exposes harmful recessive genes that are eliminated by selection

Concept Questions :-

Animal Husbandry
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A technique of micropropagation is

(a) Somatic hybridisation

(b) Somatic embryogenesis

(c) Protoplast fusion

(d) Embryo rescue

Concept Questions :-

Plant Tissue Culture
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Which of the following enhances or induces fusion of protoplasts?

(1) Sodium chloride and potassium chloride

(2) Polyethylene glycol and sodium nitrate

(3) IAA and kinetin

(4) IAA and gibberellins

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In vitro clonal propogation in plants characterised by

(a) PCR and RAPD

(b) Northen blotting

(c) Electrophoresis and HPLC

(d) Microscopy

Concept Questions :-

Plant Tissue Culture
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An alga which can be employed as food for human being is

(a) Ulothrix

(b) Chlorella

(c) Spirogyra

(d) Polysiphonia

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To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?

(a) Apical meristem only

(b) Palisade parenchyma

(c) Both apical and axillary meristems

(d) Epidermis only

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