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The cypress trees of the Louisiana wetlands are threatened by the expl

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The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post Updated on: 03 Jan 2019, 06:53
3
3
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

67% (01:17) correct 33% (01:23) wrong based on 211 sessions

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The cypress trees of the Louisiana wetlands are threatened by the exploding population of nutria, a type of South American rodent introduced into the area in the 1930s in hopes of starting a nutria fur industry. Unfortunately, no one wanted the fur, and now the rodents number in the millions. A park ranger has suggested introducing the South American jaguar, the nutria’s natural predator, into the Louisiana wetlands as a way to control the nutria population.

Which of the following, if true, casts the most doubt on the ranger’s plan to introduce jaguars as an effective way to control the nutria population?

A. Past attempts to control the nutria population through traps and poison have resulted in limited and temporary population reductions.

B. A program in Florida found that the best way to conserve the root systems of wetland trees such as cypresses is to surround the trees’ roots with tough plastic barriers.

C. The jaguar is a large and deadly predator that, if introduced, could kill livestock, pets, or even humans that it encounters in the Louisiana wetlands.

D. During the past year an unusually cold winter killed an estimated 35 percent of the nutria population in the Louisiana wetlands.

E. The South American jaguar is a predator of the ferret, which is currently the chief predator of the nutria in the Louisiana wetlands.

Source: McGraw Hill GMAT
Difficulty Level: 650

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Originally posted by SajjadAhmad on 24 Feb 2017, 21:32.
Last edited by SajjadAhmad on 03 Jan 2019, 06:53, edited 3 times in total.
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Re: The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post 25 Feb 2017, 03:17
Question Type: Weaken

Mainpoint: Introduce Jaguars to reduce population of Nutria

Assumption: The plan will work.

A. Past attempts to control the nutria population through traps and poison have resulted in limited and temporary population reductions. - Incorrect. Out of context.

B. A program in Florida found that the best way to conserve the root systems of wetland trees such as cypresses is to surround the trees’ roots with tough plastic barriers. - Incorrect. Out of context.

C. The jaguar is a large and deadly predator that, if introduced, could kill livestock, pets, or even humans that it encounters in the Louisiana wetlands. - Hold.

D. During the past year an unusually cold winter killed an estimated 35 percent of the nutria population in the Louisiana wetlands. - Incorrect. Out of context.

E. The South American jaguar is a predator of the ferret, which is currently the chief predator of the nutria in the Louisiana wetlands. - Between C and E. C describes the threat from Jaguar but there is a possibility that the plan will work if Jaguars are introduced. E directly attacks the plan by stating that introducing Jaguars will lead to reduction in the population of a chief predator of Nutria, thereby increasing Nutria population.

Answer: E
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Re: The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post 25 Feb 2017, 07:31
C
Vyshak I can't follow y u chose E over C
Coz here jaguar is a predator of nutria as well

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Re: The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post 25 Feb 2017, 18:26
1
nailin16 wrote:
C
Vyshak I can't follow y u chose E over C
Coz here jaguar is a predator of nutria as well

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This is a weaken question. Option C: even though there is a threat from Jaguar to other population, Jaguar is stiill a direct predator of Nutria. --> Strengthens the plan
Option E: Jaguar attacks some other animal, which was a predator of Nutria. So the plan won't work and the impact on Nutria population will not be as serious as we thought initially.
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Re: The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post 06 Mar 2017, 03:59
quite interesting question ,the answer should be E
c is tempting but does not affect the plan as well as E is more close to the stimulus.
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Re: The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post 06 Mar 2017, 06:36
Nice question!

Choice C and E are the most likely the answer.

C - although not an ideal solution in this case, plan may still work

E - directly attacks the plan, weakening it.

Ans. E
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Re: The cypress trees of the Louisiana wetlands are threatened by the expl  [#permalink]

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New post 15 Dec 2018, 10:49
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Re: The cypress trees of the Louisiana wetlands are threatened by the expl &nbs [#permalink] 15 Dec 2018, 10:49
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The cypress trees of the Louisiana wetlands are threatened by the expl

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