Transgenic Plant
What are the various disadvantages of cross protection?

Possibility of unnecessary spread of mild virus
All of these
Possibility of mutations in inducing mild virus strain
Possibility of synergism between inducing virus and other unrelated virus

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Transgenic Plant
Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by

expressing the protein that activates expression of these genes all the time in plants
increasing evaporative cooling from leaf surfaces
expressing a gene for production of antifreeze (ethylene glycol) in plants
cooling plants using the Peltier effect

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Transgenic Plant
Cross protection against viruses in transgenic plants can be obtained by

inoculating the susceptible strain with genes of nucleocapsid
any of the above
inoculating the susceptible strain with the coat proteins of virulent strain
inoculating the susceptible strain of a crop with a mild strain of a virus that helps in developing resistance against more virulent strain

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