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# Plantings of cotton bioengineered to produce its own

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Plantings of cotton bioengineered to produce its own  [#permalink]

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13 Nov 2017, 12:38
1
imaru wrote:
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.

IMPORTANT ANALYSIS POINT :
If we read closely, in the beginning of the argument they are talking about the plantings of bioengineered cotton, but notice that later they are talking about the PLANTING as a whole is being damaged. So, from here itself we get a hint that,

Plantings of cotton = Plantings of bioengineered cotton + Plantings of non-bioengineered cotton

UNDERSTANDING THE CAUSAL ARGUMENT,
First note the CORRELATION, More Corn planted throughout cotton-growing regions, More bollworms, thus more damage to the plantings of cotton
Conclusion -- 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?

APPLYING VARIANCE TEST TO EACH AND EVERY OPTION.

A. Whether corn could be bioengineered to produce the insecticide
Yes, corn could be bioengineered to produce the insecticide. How does that affect the conclusion that -- cotton is simply being overwhelmed by corn-bred bollworms?? Its totally Irrelevant with respect to the current perspective. Lets see how,
The argument says, bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions. So, the corn was planted last year itself and knowing that corn could be bioengineered to produce the insecticide is of no use now/currently, as the corn is already planted last year. If this fact was known before hand then it could have helped to control the population of bollworms in corns and thereby, in cotton and thus, could have affected the conclusion in hand. But knowing this fact now is totally irrelevant as the corn is already planted and BOLLWORMs have already bred. INCORRECT.

B. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
Yes, plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year. This supports the conclusion that -- cotton is simply being overwhelmed by corn-bred bollworms. Its not the bioengineered one but the non-bioengineered which is causing the trouble. The bioengineered one is producing its insecticides and the bollworms are not resistant to it, means bollworms are causing damage to non-bioengineered but the bioengineered ones.
No, will weaken the conclusion. Its just the opposite. CORRECT.

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
Yes, other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them. This does not affect the conclusion at all. It even does not matter whether other bioengineered crops were able to resist pests or not. We are exclusively concerned with the plantings of cotton. It does not affect the conclusion that -- cotton is simply being overwhelmed by corn-bred bollworms. INCORRECT.

D. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms
Yes, plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms. it is again irrelevant to the conclusion in hand -- cotton is simply being overwhelmed by corn-bred bollworms. As we are specifically concerned with corn-bred bollworms not any other insect pests. INCORRECT.

E. Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton
Its clearly given in the argument that Bollworms, however, are not necessarily developing resistance to the cotton's insecticide. So this option statement is totally irrelevant. INCORRECT.

If we see clearly options C, D, and E are totally irrelevant. Option A might cause a doubt, but if we read the argument closely, option A can be quickly eliminated.
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Re: Plantings of cotton bioengineered to produce its own  [#permalink]

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23 Dec 2017, 19:09
Using POE, ones can still find that B is indeed the answer because other option choices are out of scope. By the way of explanation, B not only fills the gap about the plants that do not produce the insecticide, but also connects directly with the argument.
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Re: Plantings of cotton bioengineered to produce its own  [#permalink]

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23 Dec 2017, 23:30
IMO B
A. Whether corn could be bioengineered to produce the insecticide
: We want to know about effect of plantings of cotton that produce
the insecticide.
B. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
: correct. If this question is true, the conclusion of the argument
is weakened.
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
: We just want to know about the effect of cotton plant that
produce the insecticide or of more corn.
This is out of scope.
D. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms
: This is out of scope.
The effect of insect pests is not what we want to know
E. Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton
: This is out of scope. Insecticides are already existed by plantings
of cotton bioengineered to produce its own insecticide.
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Re: Plantings of cotton bioengineered to produce its own  [#permalink]

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14 Mar 2018, 06:25
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[/quote]

Dear mikemcgarry, GMATNinja, GMATNinjaTwo, MagooshExpert Carolyn, sayantanc2k,

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”.

Have a nice day
>_~
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Re: Plantings of cotton bioengineered to produce its own  [#permalink]

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14 Mar 2018, 23:10
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,

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”.

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:
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!
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Joined: 17 Sep 2016
Posts: 276
Re: Plantings of cotton bioengineered to produce its own  [#permalink]

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15 Mar 2018, 07:08
GMATNinja wrote:
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:

Hopefully that helps!

Hi GMATNinja,

appreciate it

I wonder how should i get updated QOTD? is there any special section for QOTD on this forum ?

>_~
Re: Plantings of cotton bioengineered to produce its own &nbs [#permalink] 15 Mar 2018, 07:08

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