题目内容

Opponents to genetically modified foods encourage scientist and policy makers to apply the precautionary principle to the approval of new products. What does this principle require?

A. Research shows that the benefits outweigh the risks associated with the product.
B. Tests on rodents have shown that the products are not a carcinogen.
C. Research has demonstrated proof of no harm before products are approved.
D. The facilities that manufacture the product have been inspected and are certified.

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The tobacco plant produces a toxic compound known as nicotine. Select the statement that best describes the function nicotine serves in the plant.

A. There is no function for the plant; scientists genetically engineered the plant to produce nicotine.
B. Nicotine protects the plant from insects that try eating it.
C. Nicotine allows the plant to grow in dry soil conditions.
D. Nicotine increases photosynthesis in tobacco plants.

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Name the substance used to kill, repel, or control certain forms of plant, fungal or animal life that are considered to be unwanted. ______

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Name the new agricultural practice that tries to curb the use of pesticides and the potential detriment to the environment by taking into account the specific needs associated with pest, the crop and the surrounding environment.Answer with three words: ______

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Mary has been suffering from unexplained weight loss. Her doctor suspects celiac disease after she tests positive for antibodies characteristic of this condition. The antibodies she tested positive for are specific for what protein? ______

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