zoezhuyan wrote:
Quote:
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
Dear
mikemcgarry,
GMATNinja,
GMATNinjaTwo,
MagooshExpert Carolyn,
sayantanc2k,
I am not sure whether I complete understand the prompt, please help to clarify.
Especially when I read “
Bollworms, however, are not necessarily developing resistance to the cotton's insecticide”, Does it mean developing resistance is not the cause?
likewise, "it is not necessarily true" means it is not true,
so I can neglect this cause -- developing resistance, right?
Then I need find an answer choice to evaluate whether the planting of bioengineered cotton suffered seriously damaged because of corn-bred bollworms, right?
Per choice B,
Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
#1 )If non bioengineered cotton does suffered the damage, then corn-bred bollworms did cause the damage, --
strenghten#2) If non bioengineered cotton does not suffered the damage, then other factor caused the damage, -- yes,
weaken but I wonder the cause should be developing resistance, or other factor except neither con-bored bollworms nor developing resistance?
I am not sure whether should I consider developing resistance a cause, because it confuses me a lot that “Bollworms, however, are not necessarily developing resistance to the cotton's insecticide”.
genuinely need your help.
Thanks in advance
Have a nice day
>_~
First of all, I have some good news... we are currently working on a QOTD post for this very question! Stay tuned for a detailed explanation.
For now, let me try to help with your questions:
Quote:
I am not sure whether I complete understand the prompt, please help to clarify.
Especially when I read “Bollworms, however, are not necessarily developing resistance to the cotton's insecticide”, Does it mean developing resistance is not the cause?
likewise, "it is not necessarily true" means it is not true,
so I can neglect this cause -- developing resistance, right?
If something is not necessarily true, it might be true and it might not be true. Consider the following example:
Our company's revenues will increase next year. That does not necessarily mean that our profits will increase.
Does that mean that profits will NOT increase? We don't know. Profits might increase and they might not. The point is that we cannot determine whether the profits will increase just because revenues will increase. Profits
might increase if revenues increase. But profits will not
necessarily increase just because revenue increases.
In this passage, we are told that bollworms are seriously damaging cotton plantings this year. That
might be evidence that bollworms are developing a resistance to the insecticide. But just because bollworms are damaging the plantings does not
necessarily mean that bollworms are developing a resistance to the insecticide. In other words, based on the evidence (damage to plantings), we cannot determine whether bollworms have developed a resistance.
THEN the author presents further evidence: " Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions." According to the author, this additional evidence suggests that bollworms have NOT developed a resistance.
Based on the initial evidence (damage to cotton plantings), we can't tell whether bollworms have developed a resistance. The additional evidence (more corn than usual) provides an alternative explanation for the initial evidence. Thus, in light of the additional evidence, the author believes that the bollworms have NOT developed a resistance. Instead, "it is likely that the cotton is simply being overwhelmed by corn-bred bollworms."
Hopefully that helps!