Transgenic Plant
What are the various disadvantages of cross protection?

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

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Transgenic Plant
Which of the following has been widely used to provide resistance against plant viruses?

Virus resistance genes from bacteria
Expression of anti-virus genes in vectors that transmit viruses
Expression of virus coat protein genes in transgenic plants
Expression of ribonuclease (RNase) genes in host plants

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