In plants, somatic embryo regeneration is induced usually by a relatively high concentration of:

(1) Benzyl amino purine

(2) IAA

(3) 2,4 - D

(4) NAA

Concept Questions :-

Plant Tissue Culture
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Inbreeding depression in animals can be overcome by:

1. A single outcross

2. Out cross for many generations

3. Cross-breeding

4. Inter-specific hybridization

Concept Questions :-

Animal Husbandry
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Identify the incorrectly matched pair:

 

Crop Variety

Resistant to

1.

Himgiri

Leaf and stripe rust

2.

Karan rai

White rust

3.

Pusa sadabahar

Bacterial blight

4.

Pusa shubhra

Black rot

Concept Questions :-

Insect & Pest Resistance
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Meristem culture is especially important to obtain: 

(1) Drought resistant plants

(2) Virus free plants

(3) Biofortified plants

(4) Androgenic haploids

Concept Questions :-

Plant Tissue Culture
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Consider the following statements:

I. Hairy leaves are associated with resistance to jassids in cotton and cereal leaf beetle in wheat

II. Low aspartic acid, high nitrogen and sugar content in maize leads to resistance to maize stem borers.

III. In wheat, solid stems lead to non preference by the stem sawfly and smooth leaved and nectar-less varieties of cotton do not attract bollworms

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Concept Questions :-

Insect & Pest Resistance
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Concept Questions :-

Breeding for Disease Resistance
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The crops engineered for glyphosate are resistant/tolerant to

(1) fungi

(2) bacteria

(3) insects

(4) herbicides

Concept Questions :-

Plant Breeding for Quality
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Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

(1) Bacterial leaf blight of rice

(2) Downy mildew of grapes

(3) Loose smut of wheat

(4) Black rust of wheat

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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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