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

Subtopic:  Plant Breeding for Quality |
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Outbreeding is an important stategy of animal husbandry because it

1. help in accumulation of superior genes

2. is useful in producing purelines of animals

3. is useful in overcoming inbreeding depression 

4. exposes harmful recessive genes that are eliminated by selection

Subtopic:  Animal Husbandry |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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A technique of micropropagation is

1. Somatic hybridisation

2. Somatic embryogenesis

3. Protoplast fusion

4. Embryo rescue

Subtopic:  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

Subtopic:  Plant Tissue Culture |
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In vitro clonal propogation in plants characterised by

1. PCR and RAPD

2. Northen blotting

3. Electrophoresis and HPLC

4. Microscopy

Subtopic:  Plant Tissue Culture |
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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?

1. Apical meristem only

2. Palisade parenchyma

3. Both apical and axillary meristems

4. Epidermis only

Subtopic:  Plant Tissue Culture |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh

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In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called

1. selection of superior recombinations

2. cross-hybridisation among the selected parents

3. evaluation and selection of parents

4. germplasm collection

Subtopic:  Plant Breeding & Its Steps |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh

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Which part would be most suitable for raising virus-free plants for micropropagation?

1. Bark

2. Vascular tissue

3. Meristem

4. Node

Subtopic:  Plant Tissue Culture |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh

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'Jaya', and 'Ratna', developed for green revolution in India are the varieties of

1. rice

2. wheat 

3. bajra

4. maize

Subtopic:  Impact: Green Revolution |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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A collection of plants and seeds having diverse alleles of all the genes of a crop is called

1. germplasm

2. gene library

3. genome

4. herbarium

Subtopic:  Plant Breeding & Its Steps |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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NEET 2021 - Achiever Batch - Aryan Raj Singh

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