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mushrooms

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Senior Manager
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mushrooms [#permalink]

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New post 12 Sep 2008, 09:43
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.

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Re: mushrooms [#permalink]

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New post 12 Sep 2008, 11:47
Nihit 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 harvesting of wild mushrooms stimulates future growth of those mushrooms.
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Re: mushrooms [#permalink]

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New post 12 Sep 2008, 11:53
D. by harvesting mushrooms, thereby stimulating the growth of more mushrooms, they are infact helping chanterelle tree, not endangering them.

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Re: mushrooms [#permalink]

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New post 12 Sep 2008, 13:41
agree with D

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Re: mushrooms [#permalink]

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New post 12 Sep 2008, 13:45
One more vote for D.

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Re: mushrooms [#permalink]

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New post 24 Sep 2008, 07:00
D here as well.
to help you understand:

the question says that mushrooms are beneficial for trees. and the conclusion states that if we cut mushrooms it is bad for the trees. (with simple words)
so what can undermine this conclusion.
well the fact that if we promote more mushroom growth by cutting mushrooms, than we benefit the trees as well.

i hope that this helps

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Re: mushrooms [#permalink]

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New post 24 Sep 2008, 08:29
GMAT TIGER wrote:
Nihit 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 harvesting of wild mushrooms stimulates future growth of those mushrooms.


Can somebody explain why can't the answer be "E"
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Re: mushrooms [#permalink]

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New post 24 Sep 2008, 09:16
E cannot be the ans. because it restricts the discussion to only"young Douglas Fir seedlings" where as the question talks about 'douglas Fir" only. The ans. has got to be D

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Re: mushrooms [#permalink]

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New post 24 Sep 2008, 09:59
nikhiljain05 wrote:
GMAT TIGER wrote:
Nihit 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 harvesting of wild mushrooms stimulates future growth of those mushrooms.


Can somebody explain why can't the answer be "E"


This is very simple. E cant be the answer because rather than weakening the conclusion it strengthens it. It gives the reason to support the conclusion that mushrooms shouldnt be harvested.

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Re: mushrooms   [#permalink] 24 Sep 2008, 09:59
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