Multiple Choice QuestionsA system of rotating crops with legume or grass pasture to improve soil structure and fertility is called
contour farming
strip farming
shifting agriculture
shifting agriculture
Which of the following Bt crops is being grown in India by the farmers?
Maize
Cotton
Brinjal
Brinjal
In the plant breeding programmes, the entire collection (of plants/ seeds) having all the diverse alleles for all genes a given crop is called
selection of superior recombinants
cross - hybridisation among the selected parents
evaluation and selection of parents
evaluation and selection of parents
Outbreeding is an important strategy of animal husbandry because it
helps in accumulation of superior genes
is useful in producing purelines of animals.
is useful in overcoming inbreeding depression.
is useful in overcoming inbreeding depression.
Which part would be most suitable for raising virus-free plants for micropropagation?
Bark
Vascular tissue
Meristem
Meristem
A technique of micropropagation is
somatic hybridization
somatic embryogenesis
protoplast fusion
protoplast fusion
B.
somatic embryogenesis
Somatic embryogenesis is technique of micropropagation. Micropropagation is the growing of plants from meristematic tissue or somatic cells of plants on suitable nutrient media under controlled conditions. The technique used to generate new plantlets by micropropagation.
(i) Organogenesis is method of micropropagation that involves tissue regernation of adventitions organs or axillary buds from explants.
(ii) Somatic embroygenesis is development of embryos without formation of zygote (i.e. development from somatic cells)
Which of the following enhances or induces fusion of protoplasts?
Sodium chloride and potassium chloride
Polyethylene glycol and sodium nitrate
IAA and kinetin
IAA and kinetin
'Jaya' and 'Ratna' developed for green revolution in India are the varieties of
rice
wheat
'Himgiri' developed by hybridization and selection for disease resistance against rust pathogens is a variety of
Maize
sugarcane
wheat
wheat
An organism used as a biofertilizer for raising soybean crop is
Azospirillum
Rhizobium
Nostoc
Nostoc
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