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

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

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Transgenic Plant
Antisense technology

combines genetic material from different species
combines organelles and cells
selectively blocks expression of a gene
alters or transfers cells

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

any of the above
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
inoculating the susceptible strain with the coat proteins of virulent strain

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