It is currently 22 Jun 2017, 16:09

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Extinction is a process that can depend on a variety of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 29 Sep 2006
Posts: 94
Extinction is a process that can depend on a variety of [#permalink]

Show Tags

New post 10 Oct 2006, 15:04
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

Extinction is a process that can depend on a variety of ecological, geographical, and physiological variables. These variables affect different species of organisms in different ways, and should, therefore, yield a random pattern of extinctions. However, the fossil record shows that extinction occurs in a surprisingly definite pattern, with many species vanishing at the same time.
Which of the following, if true, forms the best basis for at least a partial explanation of the patterned extinctions revealed by the fossil record?
(A) Major episodes of extinction can result from widespread environmental disturbances that affect numerous different species.
(B) Certain extinction episodes selectively affect organisms with particular sets of characteristics unique to their species.
(C) Some species become extinct because of accumulated gradual changes in their local environments.
(D) In geologically recent times, for which there is no fossil record, human intervention has changed the pattern of extinctions.
(E) Species that are widely dispersed are the least likely to become extinct.
SVP
SVP
User avatar
B
Joined: 05 Jul 2006
Posts: 1747
GMAT ToolKit User
 [#permalink]

Show Tags

New post 10 Oct 2006, 15:46
I think it is D
Intern
Intern
avatar
Joined: 25 Sep 2006
Posts: 23
Re: CR Question [#permalink]

Show Tags

New post 10 Oct 2006, 16:38
should be A

theory says x
example shows NOT x

ayushi wrote:
Extinction .. depend on a variety of .. variables. .. affect different species ..different ways, ..random pattern ..record shows that extinction occurs ..definite pattern, ..species vanishing at the same time.

Which of the following, if true, forms the best basis for at least a partial explanation of the patterned extinctions revealed by the fossil record?


we need to isolate basis for at least a partial explanation

(A) Major episodes of extinction can result from widespread environmental disturbances that affect numerous different species.
Intern
Intern
avatar
Joined: 06 Sep 2006
Posts: 27
 [#permalink]

Show Tags

New post 10 Oct 2006, 17:14
One vote for A
Manager
Manager
avatar
Joined: 29 Sep 2006
Posts: 94
 [#permalink]

Show Tags

New post 10 Oct 2006, 17:31
OA Is A
Director
Director
avatar
Joined: 23 Jun 2005
Posts: 841
GMAT 1: 740 Q48 V42
 [#permalink]

Show Tags

New post 10 Oct 2006, 18:54
A, even though OA has been posted already.
VP
VP
avatar
Joined: 21 Mar 2006
Posts: 1127
Location: Bangalore
 [#permalink]

Show Tags

New post 11 Oct 2006, 04:34
Narrowed it down to A and B. B does not explain why the extinction patterns should be definite. A offers an explantion. Has to be A.
VP
VP
User avatar
Joined: 25 Jun 2006
Posts: 1166
 [#permalink]

Show Tags

New post 11 Oct 2006, 18:56
A 2
  [#permalink] 11 Oct 2006, 18:56
    Similar topics Author Replies Last post
Similar
Topics:
The economy around Lake Paqua depends on fishing of the lake's landloc vinnik 0 04 Dec 2016, 02:34
1 Addiction has been defined as dependence on and abuse of a noboru 7 19 Jun 2010, 17:01
1 Mr. Primm: If hospitals were private enterprises, dependent sagarsabnis 2 08 Dec 2009, 13:09
The stable functioning of a society depends upon the prinits 5 23 Jul 2009, 01:13
Extinction is a process that can depend on a variety of goalsnr 9 24 Jul 2008, 13:14
Display posts from previous: Sort by

Extinction is a process that can depend on a variety of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.