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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOutbreeding 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA technique of micropropagation is
1. Somatic hybridisation
2. Somatic embryogenesis
3. Protoplast fusion
4. Embryo rescue
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn vitro clonal propogation in plants characterised by
1. PCR and RAPD
2. Northen blotting
3. Electrophoresis and HPLC
4. Microscopy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTo 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich part would be most suitable for raising virus-free plants for micropropagation?
1. Bark
2. Vascular tissue
3. Meristem
4. Node
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology'Jaya', and 'Ratna', developed for green revolution in India are the varieties of
1. rice
2. wheat
3. bajra
4. maize
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology