填空题

The two factors contributing to the appealing of GM crops to farmer. are ______ and______.

【参考答案】

operation simplification，yields increase
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The plants would be insect resistant as a gene from the soil bacterium could direct cells to produce______that is toxic to certain insects.
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To certain extent, GM crops are regarded as ______since the gene inserted into a plant cannot be seen, tasted or touched.
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