Transgenic Plant
Insect resistance in the transgenic plant has been achieved by

transferring genes for protease inhibitors
All of these
transferring genes for Bt toxins
transferring genes for other insecticidal secondary metabolities

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

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
inoculating the susceptible strain with genes of nucleocapsid
any of the above

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