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
C.
Meristem
Generally, it is believed that actively growing regions of plants(i.e., shoot apex and root apex) do not have viruses. Due to this big advantage, these regions are used in the production of virus-free plants through meristem culture technique. In meristem culture explants are taken from shoot apex or shoot apical meristem. These explants are cultured on a medium containing more cytokinin that auxin hormone. Thus, meristem culture involves the development of an already existing shoot apical meristem and subsequently, the regeneration of adventitious root from the developed shoots.
A technique of micropropagation is
somatic hybridization
somatic embryogenesis
protoplast fusion
protoplast fusion
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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