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RC - Species Extinction (Short Passage)

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RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 02:11
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Take 5 to 7 mins to solve this passage:
----
According to a theory advanced
by researcher Paul Martin, the wave
of species extinctions that occurred
Line in North America about 11,000 years
(5) ago, at the end of the Pleistocene era,
can be directly attributed to the arrival
of humans, i.e., the Paleoindians, who
were ancestors of modern Native
Americans. However, anthropologist
(10) Shepard Krech points out that large
animal species vanished even in areas
where there is no evidence to demon-
strate that Paleoindians hunted them.
Nor were extinctions confined to large
(15) animals: small animals, plants, and
insects disappeared, presumably not
all through human consumption. Krech
also contradicts Martin’s exclusion of
climatic change as an explanation by
(20) asserting that widespread climatic
change did indeed occur at the end of
the Pleistocene. Still, Krech attributes
secondary if not primary responsibility
for the extinctions to the Paleoindians,
(25) arguing that humans have produced
local extinctions elsewhere. But,
according to historian Richard White,
even the attribution of secondary
responsibility may not be supported
(30) by the evidence. White observes that
Martin’s thesis depends on coinciding
dates for the arrival of humans and the
decline of large animal species, and
Krech, though aware that the dates
(35) are controversial, does not challenge
them; yet recent archaeological
discoveries are providing evidence
that the date of human arrival was
much earlier than 11,000 years ago.
--------------------------------------------------------------------------------
Q1:
Which of the following is true about Martin’s theory, as that theory is described in the passage?

A. It assumes that the Paleoindians were primarily dependent on hunting for survival.

B. It denies that the Pleistocene species extinctions were caused by climate change.

C. It uses as evidence the fact that humans have produced local extinctions in other situations.

D. It attempts to address the controversy over the date of human arrival in North America.

E. It admits the possibility that factors other than the arrival of humans played a role in the Pleistocene extinctions.

--------------------------------------------------------------------------------
Q2:
In the last sentence of the passage, the author refers to “recent archaeological discoveries” (lines 36-37) most probably in order to

A. refute White’s suggestion that neither Maritn nor Krech adequately account for Paleoindians’ contributions to the Pleistocene extinctions

B. cast doubt on the possibility that a more definitive theory regarding the causes of the Pleistocene extinctions may be forthcoming

C. suggest that Martin’s, Krech’s, and White’s theories regarding the Pleistocene extinctions are all open to question

D. call attention to the most controversial aspect of all the current theories regarding the Pleistocene extinctions

E. provide support for White’s questioning of both Martin’s and Krech’s positions regarding the role of Paleoindians in the Pleistocene extinctions

--------------------------------------------------------------------------------
Q3:
Which of the following, if true, would most weaken Krech’s objections to Martin’s theory?

A. Further studies showing that the climatic change that occurred at the end of the Pleistocene era was even more severe and widespread than was previously believed

B. New discoveries indicating that Paleoindians made use of the small animals, plants, and insects that became extinct

C. Additional evidence indicating that widespread climatic change occurred not only at the end of the Pleistocene era but also in previous and subsequent eras

D. Researchers’ discoveries that many more species became extinct in North America at the end of the Pleistocene era than was previously believed

E. New discoveries establishing that both the arrival of humans in North America and the wave of Pleistocene extinctions took place much earlier than 11,000 years ago
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Last edited by priyankur_saha@ml.com on 10 Apr 2009, 10:34, edited 1 time in total.
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 02:30
B D C ?
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 05:08
is it B C c

Please post OA?
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 08:07
AEC
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 10:33
everyone agrees to C on 3rd question?? I got B!!
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 10:47
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 10 Apr 2009, 20:23
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yeah..........OA is same

nitya34 wrote:
Thanks for posting
BEB?

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Re: RC - Species Extinction (Short Passage) [#permalink] New post 14 Apr 2009, 20:30
Priyankur and Nitya,

Please explain your answers for 1.

I got A as answer because if that were not the case Shepard Krech would not have pointed out that large animal species vanished even in areas where there is no evidence to demon-
strate that Paleoindians hunted them
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 06 Oct 2009, 13:45
I thought Q2 was the hardest. I got it wrong. I missed the fact that Krech claims that humans had secondary responsibility - a fact which is disputed by white, and supported by evidence in the end of the passage.
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 21 Oct 2009, 22:09
AEB
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One Final Try.......

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Re: RC - Species Extinction (Short Passage) [#permalink] New post 28 Jan 2014, 22:39
For question 1 : I am confused between A and B. both are true. Please help.
For question 2: B
QUESTION 3: E
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 13 May 2014, 04:30
aditi1903 wrote:
For question 1 : I am confused between A and B. both are true. Please help.

The problematic words in choice A are "primarily" and "for survival". Yes, Martin's theory assumes that Paleoindians hunted animals, but that's all you can say. Was it their "primary" food "for survival" ? Perhaps and is reasonable..BUT NOT stated in the passage. Also, the correctness of Martin's theory doesn't depend on it.
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Re: RC - Species Extinction (Short Passage) [#permalink] New post 31 Jul 2014, 19:10
For those that give value to official questions, this is a GMATPrep passage.
Re: RC - Species Extinction (Short Passage)   [#permalink] 31 Jul 2014, 19:10
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