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Plantings of cotton bioengineered to produce its own

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

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New post 23 Aug 2017, 09:15
B is correct - If bollworm damage on non-bioengineered cotton is worse than usual this year, then bollworm infestation in general is simply worse than usual, so pesticide resistance does not need to be invoked to explain the bollworm attacks on the bioengineered cotton.

Situation: Although plantings of cotton bioengineered to produce an insecticide to combat bollworms were little damaged by the pests in previous years, they are being severely damaged this year. Since the bollworms breed on corn, and there has been more corn planted this year in cotton-growing areas, the cotton is probably being overwhelmed by the cornbred bollworms.
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Re: Plantings of cotton bioengineered to produce its own [#permalink]

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New post 12 Sep 2017, 00:13
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

answer is b
If you narrow down all options except b and c will be eliminated and closely looking b is a better answer as in c other crops won't have effect on cotton
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Plantings of cotton bioengineered to produce its own [#permalink]

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New post 13 Nov 2017, 11:38
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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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New post 23 Dec 2017, 18:09
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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New post 23 Dec 2017, 22:30
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.
Re: Plantings of cotton bioengineered to produce its own   [#permalink] 23 Dec 2017, 22:30

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