Find all School-related info fast with the new School-Specific MBA Forum

It is currently 19 Apr 2014, 21:49

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Amphibian populations are declining in numbers worldwide.

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
SVP
SVP
Joined: 28 Dec 2005
Posts: 1597
Followers: 2

Kudos [?]: 67 [0], given: 2

GMAT Tests User
Amphibian populations are declining in numbers worldwide. [#permalink] New post 24 Oct 2007, 04:10
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Amphibian populations are declining in numbers
worldwide. Not coincidentally, the earth’s ozone
layer has been continuously depleted throughout the
last 50 years. Atmospheric ozone blocks UV-B, a
type of ultraviolet radiation that is continuously
produced by the sun, and which can damage genes.
Because amphibians lack hair, hide, or feathers to
shield them, they are particularly vulnerable to UV-B
radiation. In addition, their gelatinous eggs lack the
protection of leathery or hard shells. Thus, the
primary cause of the declining amphibian population
is the depletion of the ozone layer.
Each of the following, if true, would strengthen the
argument EXCEPT:
(A) Of the various types of radiation blocked by
atmospheric ozone, UV-B is the only type
that can damage genes.
(B) Amphibian populations are declining far more
rapidly than are the populations of
nonamphibian species whose tissues and
eggs have more natural protection from
UV-B.
(C) Atmospheric ozone has been significantly
depleted above all the areas of the world in
which amphibian populations are declining.
(D) The natural habitat of amphibians has not
become smaller over the past century.
(E) Amphibian populations have declined
continuously for the last 50 years.
Intern
Intern
User avatar
Joined: 02 Aug 2007
Posts: 38
Followers: 0

Kudos [?]: 6 [0], given: 0

Re: CR: Amphibian Population [#permalink] New post 24 Oct 2007, 04:52
pmenon wrote:
Amphibian populations are declining in numbers
worldwide. Not coincidentally, the earth’s ozone
layer has been continuously depleted throughout the
last 50 years. Atmospheric ozone blocks UV-B, a
type of ultraviolet radiation that is continuously
produced by the sun, and which can damage genes.
Because amphibians lack hair, hide, or feathers to
shield them, they are particularly vulnerable to UV-B
radiation. In addition, their gelatinous eggs lack the
protection of leathery or hard shells. Thus, the
primary cause of the declining amphibian population
is the depletion of the ozone layer.
Each of the following, if true, would strengthen the
argument EXCEPT:
(A) Of the various types of radiation blocked by
atmospheric ozone, UV-B is the only type
that can damage genes.
(B) Amphibian populations are declining far more
rapidly than are the populations of
nonamphibian species whose tissues and
eggs have more natural protection from
UV-B.
(C) Atmospheric ozone has been significantly
depleted above all the areas of the world in
which amphibian populations are declining.
(D) The natural habitat of amphibians has not
become smaller over the past century.
(E) Amphibian populations have declined
continuously for the last 50 years.


Ans. is A => UV-B is a radiation and is blocked thus doesnt harm the amphibian populations
Manager
Manager
Joined: 20 Feb 2007
Posts: 81
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 24 Oct 2007, 07:13
I think its D,whats the OA?
Intern
Intern
Joined: 11 Nov 2006
Posts: 31
Followers: 0

Kudos [?]: 0 [0], given: 0

 [#permalink] New post 24 Oct 2007, 08:28
I'm kinda torn between D and E.
E does not strenghen or weaken, just repeats the stem
Although, I'd pick D. Stem suggests that through the past 50 years "the primary cause of the declining amphibian population is the depletion of the ozone layer" , but D says that "The natural habitat of amphibians has not become smaller over the past century." So everything's fine :)
Intern
Intern
User avatar
Joined: 02 Aug 2007
Posts: 38
Followers: 0

Kudos [?]: 6 [0], given: 0

 [#permalink] New post 25 Oct 2007, 00:21
linau wrote:
I'm kinda torn between D and E.
E does not strenghen or weaken, just repeats the stem
Although, I'd pick D. Stem suggests that through the past 50 years "the primary cause of the declining amphibian population is the depletion of the ozone layer" , but D says that "The natural habitat of amphibians has not become smaller over the past century." So everything's fine :)


I was hesitating to pick D but finally what I understood is that since the natural habitat has not become smaller it means that it's not caused by men or some other predator that can have a geographically localized action.

In other terms only a radiation over all the natural habitat of the amphibian will kill them without reducing the surface of their natural habitat.
Senior Manager
Senior Manager
Joined: 06 Aug 2007
Posts: 371
Followers: 1

Kudos [?]: 21 [0], given: 0

GMAT Tests User
Re: CR: Amphibian Population [#permalink] New post 25 Oct 2007, 21:05
Another D.
Re: CR: Amphibian Population   [#permalink] 25 Oct 2007, 21:05
    Similar topics Author Replies Last post
Similar
Topics:
Popular new posts Amphibian populations are declining in numbers worldwide. chunjuwu 14 02 Sep 2004, 03:00
New posts Amphibian populations are declining in numbers worldwide. vshaunak@gmail.com 8 06 Jul 2007, 01:45
Popular new posts 3 Experts publish their posts in the topic Amphibian populations are declining in numbers worldwide. huntgmat 34 12 Jul 2008, 03:53
New posts Amphibian populations are declining in numbers worldwide. rampuria 3 03 Oct 2008, 04:38
Popular new posts 4 Amphibian populations are declining in numbers worldwide. metallicafan 11 13 Feb 2011, 14:48
Display posts from previous: Sort by

Amphibian populations are declining in numbers worldwide.

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Privacy Policy| 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®.