题目内容
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 ________________.
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A 2010 study showed that about ______ of wild or weedy canola tested contained genetically modified herbicide resistance genes.
Research concluded that adoption of GM technology had reduced chemical pesticide use by ______, with the effect larger for insect-tolerant crops than herbicide-tolerant crops.
Potential environmental effects of genetically modified crops include gene flow, pesticide resistance and ___________________________.
Genetically modified crops interact directly with organisms that feed on the crops and indirectly with other organisms in the ______________.
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