Transgenic Plant
A naturally occurring variant, possessing characteristics of interest, is identified. This plant is selectively bred. This is an example of

none of these
mutant selection
traditional plant breeding
transgenic technology

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

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

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Transgenic Plant
In transgenic plants that have been manipulated to express patho-genesis-related (PR) proteins all the time it has been shown that

these provide no protection at all against pathogens
expression of two PR proteins provides some protection against a few pathogens
these proteins trigger the production of other antimicrobial defenses
expression of one PR protein provides high levels of protection against many pathogens

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