Zoologists warn of an imminent surge in the number of animal : GMAT Critical Reasoning (CR)
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# Zoologists warn of an imminent surge in the number of animal

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Zoologists warn of an imminent surge in the number of animal [#permalink]

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24 Jul 2006, 12:03
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Zoologists warn of an imminent surge in the number of animal species that will become extinct within this century. They caution that the rate of extinction will only increase. They are wrong, however. One need only consider the information gathered on insects: 47 species of North American insect vanished between 1900 and 1950, but only 23 species of such insects became extinct between 1950 and 2000.

The answer to which of the following questions provides information that would be most helpful in evaluating the argument above?

A. How many species of non-native insect species have been introduced into North America since 1950?
B. Has any special effort been made to save North American insect species?
C. How many years' experience do the zoologists have in evaluating patterns of extinction among animals?
D. Are insects susceptible to the same causes of extinction as are mammals?
E. How many acres of woodland are set aside each year as wildlife refuges?
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24 Jul 2006, 12:32
B it is.

See my very detailed explanation here:
http://www.gmatclub.com/phpbb/viewtopic.php?t=30560
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24 Jul 2006, 12:43
ps_dahiya wrote:
B it is.

See my very detailed explanation here:
http://www.gmatclub.com/phpbb/viewtopic.php?t=30560

very nice job.
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Re: CR: Zoologist [#permalink]

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24 Jul 2006, 13:20
Seems a close call between C and D... D seems then more linked to the passage A,B and E are out of scope
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24 Jul 2006, 13:30
great answear dahiya are there any other evaluate the argument questions....this is the first one that I have seen.... seems though this question type..
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24 Jul 2006, 13:32
Ps_dahiya, I agree with your reasoning that supports B, but can you elaborate on why not D. Not very convinced with the reason for rejecting D.
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24 Jul 2006, 13:37
zoom612 wrote:
Ps_dahiya, I agree with your reasoning that supports B, but can you elaborate on why not D. Not very convinced with the reason for rejecting D.

D link insects and mammals, while the passage talks about animals.....mammals are a subcategory of animals so the question is ruled out.....
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24 Jul 2006, 13:57
Gauss wrote:
zoom612 wrote:
Ps_dahiya, I agree with your reasoning that supports B, but can you elaborate on why not D. Not very convinced with the reason for rejecting D.

D link insects and mammals, while the passage talks about animals.....mammals are a subcategory of animals so the question is ruled out.....

Exactly.
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24 Jul 2006, 21:09
Got it.

But could this be an option(D) if it were given as 'animals' instead of 'mammals' ?
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24 Jul 2006, 22:29
zoom612 wrote:
Got it.

But could this be an option(D) if it were given as 'animals' instead of 'mammals' ?

B it is.
IMO, B would still be strong as data are related to insects and not animals.
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25 Jul 2006, 01:00
Clear B.......
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25 Jul 2006, 02:15
B all the way, ..the only relevant one
25 Jul 2006, 02:15
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# Zoologists warn of an imminent surge in the number of animal

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