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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 plantings are being seriously damaged by bollworms. Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide. Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing
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 be most useful to establish?
A Whether corn could be bioengineered to produce the insecticide
B Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive 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 plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms
E Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton
正确答案 B
我选的D，我认为如果今年的cotton可能是由corn的虫子的影响，那要证明corn的虫子是否会对cotton的虫子产生影响
对B也有很大的疑问，我觉得B的答案只能说明 今年的灾害是不是由cotton严重的虫灾导致的， 但是不能判断和corn有没有关系
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发表于 2015-6-5 16:17:59
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