Biology Class 12 NCERT Solutions: Chapter 9 Strategies for Enhancement in Food Production Part 4 (For CBSE, ICSE, IAS, NET, NRA 2022)

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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.
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
Crop plantHybrid variety
WheatSonalika and kalian sona
RiceJaya and Ratna
CauliflowerPusa shubra and Pusa snowball K-1
CowpeaPusa Komal
MustardPusa swarnim

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