Transgenic Plant
The first field tests were conducted with which of the following genetically altered organism?

The flavrsavr tomato
Vaccinia virus containing a gene from the rabies virus
bt Corn
Strawberry seedlings sprayed with ice-minus bacteria

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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

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

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