Himgiri developed by hybridisation and selection for disease resistance against rust pathogens is a variety of

Solution

‘Himgiri’ developed by hybridisation and selection for disease resistance against rust pathogens is a variety of wheat. It is resistant to leaf/stripe rust and hill bunt.

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

Solution

Jaya and Ratna are two rice varieties developed for green revolution in India.

Compared to a bull a bullock is docile because of

Solution

The bullock is castrated and therefore secretion of testosterone is not adequate.

Which one of the following pairs is mismatched?

An improved variety of transgenic basmati rice

Solution

An improved variety of transgenic basmati rice gives high yield and is rich in vitamin A.

Somaclones are obtained by

Solution

Genetic variation present among plant cells during tissue culture is called somaclonal variation. The term somaclonal variation is also used for the genetic variation present in plants regenerated from a single culture. This variation has been used to develop several useful varieties against resistance to diseases and pests, better yield, better quality etc.

Which one of the following pairs of organisms are exotic species introduced in India ?

Solution

Exotic Species - a species that has been introduced from another geographic region to an area outside its natural range. Examples are water hyacinth, Lantana camara.

Which one of the following is being utilized as a source of biodiesel in the Indian countryside?

Solution

Pongamia pinnata is one of the few nitrogen fixing trees(NFTS) to produce seeds containing 30-40% oil. It is often planted as an ornamental and shade tree but now-a-days it is considered as alternative source for Bio-diesel.This species is commonly called pongam, karanja, or a derivation of these names. Pongami, jatropa, Euphorbia are petrocrops. However, in the Indian countryside, pongamia(kanjar) is being utilized as a source of biodiesel.

Parthenocarpic tomato fruits can be produced by

Solution

Gibberellins and Auxins are known to induce parthenocarpy in plants. If a tomato plant is treated with a low concentration of auxin and gibberellic acid it’ll produce fruits without fertilization i.e. parthenocarpic fruits.

In maize,hybrid vigour is exploited by

Solution

In maize (or in other plants) hybrid vigour in exploited by the crossing of two inbred (very closely related) plants because crossing of inbred varieties causes homozygosity and due to which hybrid vigour will be diminished because in homozygosity so many recessive traits start showing their phenotypic expression.

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