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

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

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Transgenic Plant
Expression of antisense RNA in transgenic plants is a general method used to

activate the expression of all genes in a biochemical pathway
eliminate the expression of all genes in a biochemical pathway
reduce or eliminate the expression of individual genes
block the expression of virus coat protein genes

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