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

It is currently 24 Apr 2014, 19:02

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:
Director
Director
User avatar
Joined: 14 Jan 2007
Posts: 784
Followers: 1

Kudos [?]: 37 [0], given: 0

GMAT Tests User
Amphibian populations are declining in numbers worldwide. [#permalink] New post 06 Jul 2007, 01:45
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.
Senior Manager
Senior Manager
Joined: 04 Jun 2007
Posts: 350
Followers: 1

Kudos [?]: 10 [0], given: 0

GMAT Tests User
Re: CR - Amphibian populations [#permalink] New post 06 Jul 2007, 02:38
vshaunak@gmail.com 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.


I would pick A. It does not relate to amphibians in any way.
Manager
Manager
User avatar
Joined: 29 Jan 2007
Posts: 104
Followers: 1

Kudos [?]: 8 [0], given: 0

 [#permalink] New post 06 Jul 2007, 14:17
A it should be .

Even if there are more raditations which can damage genes , it doesnt not have any effect on the argument. Argument is totally based on UV - B rays .


~sara
Director
Director
Joined: 06 Sep 2006
Posts: 746
Followers: 1

Kudos [?]: 11 [0], given: 0

GMAT Tests User
 [#permalink] New post 06 Jul 2007, 16:39
Well we are supposed to pick the best available option. So, by POE, I pick A since i could not elliminate anything else.
Manager
Manager
Joined: 30 May 2007
Posts: 56
Followers: 1

Kudos [?]: 3 [0], given: 0

 [#permalink] New post 06 Jul 2007, 17:13
why not D ok A is irrelevant but D is weakening the argument...am I wrong somewhere
Senior Manager
Senior Manager
Joined: 04 Jun 2007
Posts: 350
Followers: 1

Kudos [?]: 10 [0], given: 0

GMAT Tests User
 [#permalink] New post 06 Jul 2007, 22:44
nehanishika wrote:
why not D ok A is irrelevant but D is weakening the argument...am I wrong somewhere


D would not be ok for me, since it talks about habitat and not population. If the habitat were to remain unchanged, but still the population is reducing, it does strengthen the argument.
Manager
Manager
Joined: 23 May 2007
Posts: 109
Followers: 1

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

GMAT Tests User
 [#permalink] New post 06 Jul 2007, 23:44
A

For D
If natural habitat of amphibians had become smaller over the past century, there was a danger of them reducing in number.
Director
Director
User avatar
Joined: 14 Jan 2007
Posts: 784
Followers: 1

Kudos [?]: 37 [0], given: 0

GMAT Tests User
 [#permalink] New post 07 Jul 2007, 01:57
OA is 'A'.
Intern
Intern
Joined: 16 Jul 2007
Posts: 7
Followers: 0

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

 [#permalink] New post 21 Aug 2007, 20:33
The author asserts that the main cause is the "the depletion of the ozone layer", not the UV-B. Thus, to support the author's conclusion, the fact that UV-B is the only type that can damage genes is not necessary.

There could be any kinds of rays that can damage genes.
  [#permalink] 21 Aug 2007, 20:33
    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
Popular new posts Amphibian populations are declining in numbers worldwide. gmataquaguy 14 03 Aug 2005, 04:03
New posts Amphibian populations are declining in numbers worldwide. pmenon 5 24 Oct 2007, 04:10
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. suyashjhawar 3 29 Jul 2008, 20:59
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®.