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Eurasian water milfoil, a weed not native to Frida Lake

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Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 27 Jul 2016, 07:39
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84% (01:15) correct 16% (01:31) wrong based on 218 sessions

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Eurasian water milfoil, a weed not native to Frida Lake, has reproduced prolifically since being accidentally introduced there. In order to eliminate the weed, biologists proposed treating infested parts of the lake with a certain herbicide that is nontoxic for humans and aquatic animals. However, the herbicide might damage populations of certain rare plant species that the lake contains. For this reason local officials rejected the proposal.

Which of the following, if true, points out the most serious weakness in the officials' grounds for rejecting the biologists' proposal?

A)The continuing spread of Eurasian water milfoil in Frida Lake threatens to choke out the lake's rare plant species.
B) Because of ecological conditions prevailing in its native habitat, Eurasian water milfoil is not as dominant there as it is in Frida Lake.
C) The proliferation of Eurasian water milfoil in Frida Lake has led to reductions in the populations of some species of aquatic animals.
D) Although Eurasian water milfoil could be mechanically removed from Frida Lake, eliminating the weed would take far longer this way than it would using herbicides.
E) Unless Eurasian water milfoil is completely eliminated from Frida Lake, it will quickly spread again once herbicide treatments or other control measures cease.

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Re: Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 27 Jul 2016, 11:35
Possible weakeners: 1) The rare plant species can be regrown after the use of the herbicide
2) The rare plant species will die out if the lake is not treated with the herbicide.

A)The continuing spread of Eurasian water milfoil in Frida Lake threatens to choke out the lake's rare plant species. - Correct.

B) Because of ecological conditions prevailing in its native habitat, Eurasian water milfoil is not as dominant there as it is in Frida Lake. - Incorrect. Irrelevant

C) The proliferation of Eurasian water milfoil in Frida Lake has led to reductions in the populations of some species of aquatic animals. - Incorrect. Opposes the facts stated.

D) Although Eurasian water milfoil could be mechanically removed from Frida Lake, eliminating the weed would take far longer this way than it would using herbicides. - Incorrect. Strengthens. Mechanical removal of weeds is good if its removal doesn't affect the rate plant species.

E) Unless Eurasian water milfoil is completely eliminated from Frida Lake, it will quickly spread again once herbicide treatments or other control measures cease. - Incorrect. Out of context.

Answer: A
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Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 10 Jun 2018, 10:17
Hey abhimahna / GMATNinja,

I was stuck between A and C here. I eliminated C because option C talks about aquatic animals whereas the reasoning given by the local officials is regarding their concern for rare plant species.

Option C doesn't weaken the local officials reasoning

Is my understanding correct here?
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Re: Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 10 Jun 2018, 10:50
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pikolo2510 wrote:
Hey abhimahna / GMATNinja,

I was stuck between A and C here. I eliminated C because option C talks about aquatic animals whereas the reasoning given by the local officials is regarding their concern for rare plant species.

Option C doesn't weaken the local officials reasoning

Is my understanding correct here?


Hi Pikolo,

You are indeed correct. (C) is incorrect because it talks about the elimination of animals. Our premise only cares about rare species of plants. (A) says that if you do not use the herbicide, the plants will die no matter what. So, you must use it to give the plants a chance.
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Re: Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 11 Jun 2018, 08:10
A as per me. B,D and E strengthen the position taken by officials. Between A and C. A is the better choice!
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Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 11 Jun 2018, 08:38
Would you elaborate Option A?

Eurasian milfoil is weed, not good for lake.

Biologist proposal: Herbicide is non-toxic to human and aquatic life but will decrease population of rare plant species.
Local Officials rejected biologist proposal.

Now I don't understand why A is ground for refusal of biologist proposal.

Vyshak wrote:
Possible weakeners: 1) The rare plant species can be regrown after the use of the herbicide
2) The rare plant species will die out if the lake is not treated with the herbicide.

A)The continuing spread of Eurasian water milfoil in Frida Lake threatens to choke out the lake's rare plant species. - Correct.

B) Because of ecological conditions prevailing in its native habitat, Eurasian water milfoil is not as dominant there as it is in Frida Lake. - Incorrect. Irrelevant

C) The proliferation of Eurasian water milfoil in Frida Lake has led to reductions in the populations of some species of aquatic animals. - Incorrect. Opposes the facts stated.

D) Although Eurasian water milfoil could be mechanically removed from Frida Lake, eliminating the weed would take far longer this way than it would using herbicides. - Incorrect. Strengthens. Mechanical removal of weeds is good if its removal doesn't affect the rate plant species.

E) Unless Eurasian water milfoil is completely eliminated from Frida Lake, it will quickly spread again once herbicide treatments or other control measures cease. - Incorrect. Out of context.

Answer: A
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Re: Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 11 Jun 2018, 09:23
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gvij2017 wrote:
Would you elaborate Option A?

Eurasian milfoil is weed, not good for lake.

Biologist proposal: Herbicide is non-toxic to human and aquatic life but will decrease population of rare plant species.
Local Officials rejected biologist proposal.

Now I don't understand why A is ground for refusal of biologist proposal.

Vyshak wrote:
Possible weakeners: 1) The rare plant species can be regrown after the use of the herbicide
2) The rare plant species will die out if the lake is not treated with the herbicide.

A)The continuing spread of Eurasian water milfoil in Frida Lake threatens to choke out the lake's rare plant species. - Correct.

B) Because of ecological conditions prevailing in its native habitat, Eurasian water milfoil is not as dominant there as it is in Frida Lake. - Incorrect. Irrelevant

C) The proliferation of Eurasian water milfoil in Frida Lake has led to reductions in the populations of some species of aquatic animals. - Incorrect. Opposes the facts stated.

D) Although Eurasian water milfoil could be mechanically removed from Frida Lake, eliminating the weed would take far longer this way than it would using herbicides. - Incorrect. Strengthens. Mechanical removal of weeds is good if its removal doesn't affect the rate plant species.

E) Unless Eurasian water milfoil is completely eliminated from Frida Lake, it will quickly spread again once herbicide treatments or other control measures cease. - Incorrect. Out of context.

Answer: A


We are trying to WEAKEN the argument that we shouldn't use the herbicide. So, using the double-negative, we want a solution that proves the biologist wrong. We want to strengthen the idea that we SHOULD use the herbicide.

Does this help?
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Eurasian water milfoil, a weed not native to Frida Lake [#permalink]

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New post 11 Jun 2018, 11:27
gvij2017 wrote:
Would you elaborate Option A?

Eurasian milfoil is weed, not good for lake.

Biologist proposal: Herbicide is non-toxic to human and aquatic life but will decrease population of rare plant species.
Local Officials rejected biologist proposal.

Now I don't understand why A is ground for refusal of biologist proposal.


Option (A) simply states that if Eurasian milfoil if not treated it might damage populations of certain rare plant species that the lake contains, thus damage to the rare plant species/animals is inevitable (Whether we treat herbicide /don't), so why blame the herbicides only for the issue, the weed is also responsible for the damage as well.

I rather term it horns of a dilemma, in either way damage to plants and animals can not be avoided !!
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Eurasian water milfoil, a weed not native to Frida Lake   [#permalink] 11 Jun 2018, 11:27
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Eurasian water milfoil, a weed not native to Frida Lake

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