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 it be most useful to establish?
Plantings of cotton bioengineered to produce its owninsecticide against bollworms, a major cause of crop failure, sustained littlebollworm damage until this year. Thisyear the plantings are being seriously damaged by bollworms. Bollworms, however, are not necessarilydeveloping resistance to the cotton’s insecticide. Bollworms breed on corn, and last year morecorn than usual was planted throughout cotton-growing regions. So it is likely that the cotton is simplybeing overwhelmed by corn-bred bollworms.
In evaluating the argument, which of the following wouldbe most useful to establish?
A. Whether corn could be bioengineered toproduce the insecticide
B.Whetherplantings of cotton that does not produce the insecticide are sufferingunusually extensive damage from bollworms this year(correct)
C. Whether other crops that have beenbioengineered to produce their own insecticide successfully resist the pestsagainst which the insecticide was to protect them
D. Whether plantings of bioengineered cottonare frequently damaged by insect pests other than bollworms
E. Whether there are insecticides that can beused against bollworms that have developed resistance to the insecticideproduced by the bioengineered cotton
可以这样理解:
文中有句话说: Bollworms breed on corn, and last year more corn than usual was planted throughout cotton growing regions,这里cotton growing regions并不是只有bioengineer的cotton,也包括非bio的cotton;
文章结论是:So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms;棉花只受到了corn-bred虫子的影响
要注意cotton分两种,一种bioengineered,一种non-bioengineered,这样就能做出来了。我做错主要是被结论里的corn-bred bollworms带着走了,其实和cotton-bred是一种bollworms。
贴一下Verbal Review里面的解释.
B Correct. If bollworm damage on non-bioengineered cotton is worse than usual this year, then bollworm infestation in general is simply worse than usual, so pesticide resistance does not need to be invoked to explain the bollworm attacks on the bioengineered cotton.