The chanterelle, a type of wild mushroom, grows beneath host : GMAT Critical Reasoning (CR)
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# The chanterelle, a type of wild mushroom, grows beneath host

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19 Aug 2008, 05:24
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The chanterelle, a type of wild mushroom, grows beneath host trees such as the Douglas fir, which provide it with necessary sugars. The underground filaments of chanterelles, which extract the sugars, in turn provide nutrients and water for their hosts. Because of this mutually beneficial relationship, harvesting the chanterelles growing beneath a Douglas fir seriously endangers the tree.

Which of the following, if true, casts the most doubt on the conclusion drawn above?

(A) The number of wild mushrooms harvested has increased in recent years.
(B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees.
(C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere.
(D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.
(E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments.
[Reveal] Spoiler: OA
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20 Aug 2008, 15:23
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OA is D.
harvesting means cutting the mushrooms. So the conslusion is cutting the mushrooms endangers the tree.
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19 Aug 2008, 07:20
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ssandeepan wrote:
The chanterelle, a type of wild mushroom, grows beneath host trees such as the Douglas fir, which provide it with necessary sugars. The underground filaments of chanterelles, which extract the sugars, in turn provide nutrients and water for their hosts. Because of this mutually beneficial relationship, harvesting the chanterelles growing beneath a Douglas fir seriously endangers the tree.

Which of the following, if true, casts the most doubt on the conclusion drawn above?
(A) The number of wild mushrooms harvested has increased in recent years.
(B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees.
(C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere.
(D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.
(E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments.

IMO D) .... since number of mushrooms keep on growing even when they are harvested it does not endager the tree.

E) actually supports the argument.
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25 Aug 2008, 21:08
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ssandeepan wrote:
The chanterelle, a type of wild mushroom, grows beneath host trees such as the Douglas fir, which provide it with necessary sugars. The underground filaments of chanterelles, which extract the sugars, in turn provide nutrients and water for their hosts. Because of this mutually beneficial relationship, harvesting the chanterelles growing beneath a Douglas fir seriously endangers the tree.

Which of the following, if true, casts the most doubt on the conclusion drawn above?
(A) The number of wild mushrooms harvested has increased in recent years.
(B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees.
(C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere.
(D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.
(E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments.

D. the passage says "harvesting mushroom endangers the tree's life". D says harvesting mushroom stimulates more mushrooms. So harvesting is not a problem.
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Re: CR The chanterelle, a type of wild mushroom [#permalink]

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19 Aug 2008, 13:51
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Premise1: C grows beneath D.
Premise2: D provides sugar to C.
Premise3: C provides water to D.
Premise4: Relationship is mutual.
Conclusion: C beneath D seriously endangers the D.

(A) The number of wild mushrooms harvested has increased in recent years.
Does not point what happens to D because of this phenomenon, so not relavant.

(B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees.
Does not point why C beneath D is bad for D.

(C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere.
Environment in which C grows does not explains why for D it is bad.

(D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.
This may be true, however it does not attack conclusion at all on how this C and D relationship is bad for D.

(E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments.
This destroys the conclusion. Conclusion says because of C and D relationship, D dies, however, this tells us because of relationship D infact survives because of relationship.

IMO E.
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Re: CR The chanterelle, a type of wild mushroom [#permalink]

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19 Oct 2011, 00:51
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IMO D
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-------Analyze why option A in SC wrong-------

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17 Sep 2013, 20:59
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The chanterelle, a type of wild mushroom, grows beneath host trees such as the Douglas fir, which provide it with necessary sugars. The underground filaments of chanterelles, which extract the sugars, in turn provide nutrients and water for their hosts. Because of this mutually beneficial relationship, harvesting the chanterelles growing beneath a Douglas fir seriously endangers the tree.

Which of the following, if true, casts the most doubt on the conclusion drawn above?

(A) The number of wild mushrooms harvested has increased in recent years.
(B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees.
(C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere.
(D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.
(E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments

Thanks.
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Re: The chanterelle, a type of wild mushroom, grows beneath host [#permalink]

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17 Sep 2013, 22:40
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Expert's post
mba1382 wrote:
The chanterelle, a type of wild mushroom, grows beneath host trees such as the Douglas fir, which provide it with necessary sugars. The underground filaments of chanterelles, which extract the sugars, in turn provide nutrients and water for their hosts. Because of this mutually beneficial relationship, harvesting the chanterelles growing beneath a Douglas fir seriously endangers the tree.

Which of the following, if true, casts the most doubt on the conclusion drawn above?

(A) The number of wild mushrooms harvested has increased in recent years.
(B) Chanterelles grow not only beneath Douglas firs but also beneath other host trees.
(C) Many types of wild mushrooms are found only in forests and cannot easily be grown elsewhere.
(D) The harvesting of wild mushrooms stimulates future growth of those mushrooms.
(E) Young Douglas fir seedlings die without the nutrients and water provided by chanterelle filaments

Thanks.

What is the conclusion?
"harvesting the mushroom seriously endangers these trees"

To weaken it we need to provide an explanation why harvesting the mushroom may not endanger these trees.
We know that mushrooms and trees benefit each other.
Option (D) tells us that harvesting of wild mushrooms stimulates future growth of those mushrooms. This means that even if you harvest the mushrooms, they will grow back and hence the beneficial relation will continue or perhaps even become better since harvesting stimulates future growth.
This weakens the statement that harvesting the mushrooms endangers these trees.

None of the other options weaken our conclusion.
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19 Aug 2008, 05:30
I think its an easy one..E..guys, am i underestimating?
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19 Aug 2008, 10:54
Good point nmohindru!

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19 Aug 2008, 11:00
yup I concur that it is D
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19 Aug 2008, 11:05
I think is D. E supports the argument.
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22 Aug 2008, 10:46
E supports the conclusion, and youre looking for the one that casts the most doubt
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25 Aug 2008, 08:37
I went for D
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25 Aug 2008, 15:10
i think D is the correct one.
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25 Aug 2008, 15:11
yeupp clear D
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25 Aug 2008, 20:51
If the harvesting of wild mushrooms stimulates future growth of those mushrooms then there is not reason to worry about the endangerement of the Douglas Fir! So "D" counters the conclusion drawn above.
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27 Aug 2008, 03:22
D it is
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13 Oct 2010, 04:53
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13 Oct 2010, 05:14
definitely D
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Re: CR The chanterelle, a type of wild mushroom   [#permalink] 13 Oct 2010, 05:14

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