Transgenic Plant
The controversy regarding the use of Bt corn is that it

both (a) and (b)
is potentially harmful to monarch butterflies
is a potential allergen to humans
can contaminate groundwater

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

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

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