题目内容

GMO proponents note that because of the safety testing requirements, the risk of introducing a plant variety with a new _________ or toxin is much smaller than from traditional breeding processes, which do not require allergen tests.

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GM crops interact directly with organisms that feed on the crops and indirectly with other organisms in the ___________.

Crop genetic diversity might decrease due to the development of superior GM strains that crowd others out of the market. The actual effect on biodiversity is _____________.

Introduced traits in GM crops potentially can cross into neighboring plants of the same or closely related species through three different types of gene flow: crop-to-crop, crop-to-weedy, and ________________.

A 2010 study showed that about ______ of wild or weedy canola tested contained genetically modified herbicide resistance genes.

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