无耻的校长
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- 2017-10-19
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In Canada, 42 genetically modified plants have been approved for human consumption; they include certain varieties of canola, tomatoes, potatoes, corn, soya, flax, cotton and squash.(3) These plants are used in a range of food products; for instance, soya is used in processed products such as chocolate, baby food and cake mixes. Transgenic animals have been produced for research purposes or for manufacturing pharmaceutical products but, for the moment, these have not entered the food chain.西红柿没有转基因的。西红柿本身比较抗虫害,转基因不能提高产量。上世纪某十年代搞过转基因西红柿,产量没变化,没市场就淘汰了。转基因种子退化厉害,所以现在没有转金银西红柿种子。