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

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

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

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

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