GWD-23-Q14 求问 sdcar2010

amethyst9064

GWD-23-Q14
Plantingsof cotton bioengineered to produce its own insecticide against bollworms, amajor cause of crop failure, sustained little bollworm damage until thisyear.  This year the plantings arebeing seriously damaged by bollworms. Bollworms, however, are not necessarily developing resistance to thecotton’s insecticide.  Bollwormsbreed on corn, and last year more corn than usual was planted throughoutcotton-growing regions.  So it islikely that the cotton is simply being overwhelmed by corn-bred bollworms.
Inevaluating the argument, which of the following would be most useful toestablish?
A.    Whethercorn could be bioengineered to produce the insecticide
B.     Whetherplantings of cotton that does not produce the insecticide are sufferingunusually extensive damage from bollworms this year
C.    Whetherother crops that have been bioengineered to produce their own insecticidesuccessfully resist the pests against which the insecticide was to protect them
D.    Whetherplantings of bioengineered cotton are frequently damaged by insect pests otherthan bollworms
E.     Whetherthere are insecticides that can be used against bollworms that have developedresistance to the insecticide produced by the bioengineered cotton


我是用排除法选的B   但是能不能请大牛sdcar2010分析一下为啥B对! 多谢了

sdcar2010

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 (Background facts). Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide (opinion).  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.Soit is likely that the cotton is simply being overwhelmed by corn-bred bollworms.

Inevaluating the argument, which of the following would be most useful to establish?

So the conclusion is: It is likely that the cotton is damaged by bollworms breeding on corn. The premises: 1)  boll worms breed on corn; and 2) more corn than usual was planted in the cotton-growing regions.

If you look at the argument, it hinges on the assumption that the bollworms eating cotton come from the corn field.

To find the correct answer for an evaluation question, you simply answer Yes or No to the evaluation question, and then see the effects on the conclusion.

B) Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year.

If Yes, then cotton crops are heavily damaged by bollworms. It agrees with the conclusion that bollworms from corn field eat cotton. The conclusion holds.
If No, then we have a problem with the conclusion. If cotton without bio-inseticide does not suffer from unusual damages from bollworm, there might not be HUGE amount of bollworm coming from the corn field. Then the heavy damage to bio-engineered cotton is caused by the bollworm breeding within these bio-engineered cotton. Thus, the conclusion falls apart.

wsyzzydy

what about D?

Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms


if the answer is yes, it suggests that there are other factors that may cause the damage and therefore weaken the conclusion.

I'm confused~~~

sdcar2010

what about D?

Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms


if the answer is yes, it suggests that there are other factors that may cause the damage and therefore weaken the conclusion.

I'm confused~~~

-- by 会员 wsyzzydy (2012/2/7 11:42:23)

Pay attetion to the new info of "pests other than bollworms." This has nothing to do with the conclusion, either yes or no. So no effect.