超星 - Test 18 - 查题吧

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Nematodes are currently treated with toxic chemicals such as __________, which do not enter the food chain, but are expensive to apply and can make soil sterile, killing other living organisms within it.

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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 ___________.

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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 _____________.

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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.

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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.

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Potential environmental effects of genetically modified crops include gene flow, pesticide resistance and ___________________________.

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Genetically modified crops interact directly with organisms that feed on the crops and indirectly with other organisms in the ______________.

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A genetically modified organism (GMO) is any organism whose genetic material has been altered using _______________________________.

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