[求助]GWD-23-Q14，呼唤NN来帮帮忙~

ivypp

40. GWD-23-Q14

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?

 

1. Whether corn could be bioengineered to produce the insecticide

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

3. Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them

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

5. Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton

这题我怎么觉得没有一个答案对啊，想不通，请求NN们帮忙点拨一下，有人说是选B，理由是回答YES则说明是吃玉米导致棉虫不怕杀虫剂，NO则说明是棉虫自身产生抗药性。我觉得说不通啊，难道说产生抗药性的棉虫就不吃普通棉花了吗？我不知道从生物上说是不是这样的，但是AT LEAST这不是一个能作为常识的ASSUMPTION啊，晕~

 

我SUPPOSE答案的方向应该是受到有没有周围没有玉米的抗虫棉花受到虫灾？若YES说明是棉虫自身产生抗药性，NO说明是吃玉米导致棉虫不怕杀虫剂。我是不是想岔了大家来帮帮忙啊。。

liubin1987

文章已经给过大前提，说农作物大都是因为B虫而产量减少的，而且给了信息说，自从用了这种生物技术后，一直以来都很少减产，直到去年因为种了很多B虫爱吃的CORN才突然一下出现棉花减产，所以下结论说，棉花的减产是因为经不起B虫的攻击；D实际上是违背了已经假定好的前提去分析，这是错误的；而B，对没有用生物技术加工的，即不能自己产生杀虫剂的棉花分析，拿它的状况和有能力产杀虫剂的进行比较，如果不能产的数量也少就支持了观点，说明是因为虫子的问题，如果不是，则说明是因为其他原因引起的；最佳的答案

我个人的一些笔记

ivypp

:O 原来是这样啊,谢谢楼上的

rpch2004

个人观点：

B说是否不能产生“杀虫剂”的cotton也被B虫大量损坏？

回答是，则说明喜欢corn的B虫也喜欢吃cotton，增加了喜欢corn的B虫吃掉能产生杀虫剂”的cotton的可能性（尽管这里还要做一个假设，即喜欢吃corn的B虫有抗药性，不然它怎么吃掉能产生杀虫剂”的cotton？但是，此处只要有加强作用就行）

回答否，则说明喜欢corn的B虫不喜欢吃cotton，削弱了喜欢corn的B虫吃掉能产生杀虫剂”的cotton的可能性，说明是其他原因导致了能产生杀虫剂”的cotton数量的减少

[此贴子已经被作者于2008-6-13 20:36:16编辑过]