Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year. This year the plantingsa are being seriously dameged by bollworms. Bollworms, however, are not necessarily resisitance to the cotton's insecticide. Bollworms breed on corn, and last more corn than usual was pianted throughout to the cotton's regions. So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms. In evaluating the argument, which of the following would it be most useful to eatablish?
(a) Whether corn could be bioengineered to produce the insectiside (b) Whether plantings of cotton that does not produce the insectiside are suffering unusually extentive damage from bollworms this year (c) Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them (d) Whether Whether plantings of bioengineered cotton are frequently damaged by pests other than bollworms (e) Whether there are insectisides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton 答案是B
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发表于 2009-12-12 23:10:33
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