behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme
halt the production of juvenile hormone. This enzyme can be synthesized and will, on being ingested by
immature caterpillars, kill them by stopping them from feeding.
Which of the following, if true, most strongly supports the view that it would NOT be advisable to try to eradicate
agricultural pests that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?
(A) Most species of caterpillar are subject to some natural predation.
(B) Many agricultural pests do not go through a caterpillar stage.
(C) Many agriculturally beneficial insects go through a caterpillar stage.
(D) Since caterpillars of different species emerge at different times, several sprayings would be necessary.
(E) Although the enzyme has been synthesized in the laboratory, no large-scale production facilities exist
as yet.
OA is C
Anyone can help explain why E is incorrect? I choose E because if the production facilities do not exist yet, it is undoubtly unwise for the farmers to use this method, because scientists just cannot produce enough such enzyme. Why this cannot weaken those who suggest to spray such enzyme?
Any experts can give some suggestions because I really find myself beaten by critical reasoning. I just don't know how to beat the critical reasoning. Sometimes I find some questions quite easy, but sometimes a certain question may drives me crazy. Sometimes I bang my head to walls again and again, and still cannot understand. Anyone can give me some suggestions? I have study CR for more than half a year and still don't know what the CR wants to test us. To test our IQ? Or to test our ability to find relevant and irrelevant information?
Can any experts say something?????
![Crying or Very sad :cry:](./images/smilies/crying.png)
![Crying or Very sad :cry:](./images/smilies/crying.png)