Biology Class 12 NCERT Solutions: Chapter 9 Strategies for Enhancement in Food Production Part 4

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Q.11 Find out what the various components of the medium used for propagation of explants in vitro are?

Answer:

  • The major components of medium used for propagation of explants in vitro are carbon sources such as sucrose, inorganic salts, vitamins, amino acids, water, agar-agar, and certain growth hormones such as auxins and gibberellins.

Image of Propagation of Vitro

Image of Propagation of Vitro

Q.12 Name any five hybrid varieties of crop plants which have been developed in India.

Answer:

The five hybrid varieties of crop plants which have been developed in India are:

Table of Hybrid Varieties of Crop Plants
Table of Hybrid Varieties of Crop Plants

Crop plant

Hybrid variety

Wheat

Sonalika and kalian sona

Rice

Jaya and Ratna

Cauliflower

Pusa shubra and Pusa snowball K-1

Cowpea

Pusa Komal

Mustard

Pusa swarnim

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