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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] New post 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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 [#permalink] New post 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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 [#permalink] New post 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] New post 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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 [#permalink] New post 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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 [#permalink] New post 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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 [#permalink] New post 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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 [#permalink] New post 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.....

:yes Exactly.
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 [#permalink] New post 24 Jul 2006, 21:09
Got it. :cool

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

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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 [#permalink] New post 25 Jul 2006, 01:00
:arrow: Clear B.......
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 [#permalink] New post 25 Jul 2006, 02:15
B all the way, ..the only relevant one
  [#permalink] 25 Jul 2006, 02:15
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