Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

It is currently 27 May 2017, 22:59

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

Marine biologists have long thought that variation in the

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 05 Mar 2011
Posts: 145
Followers: 0

Kudos [?]: 55 [0], given: 3

Marine biologists have long thought that variation in the [#permalink]

Show Tags

New post 09 Dec 2011, 18:07
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

61% (02:25) correct 39% (02:10) wrong based on 18 sessions

HideShow timer Statistics

Marine biologists have long thought that variation in the shell color of aquatic snails evolved as a protective camouflage against birds and other predators. Brown shells seem to be more frequent when the underlying seafloor is dark-colored and white shells more frequent when the underlying seafloor is light-colored. A new theory has been advanced, however, that claims that shell color is related to physiological stress associated with heat absorption. According to this theory, brown shells will be more prevalent in areas where the wave action of the sea is great and thus heat absorption from the Sun is minimized, whereas white shells will be more numerous in calmer waters where the snails will absorb more heat from the Sun's rays.
Evidence that would strongly favor the new theory over the traditional theory would be the discovery of a large majority of
(A) dark-shelled snails in a calm inlet with a dark, rocky bottom and many predators
(B) dark-shelled snails in a calm inlet with a white, sandy bottom
(C) light-shelled snails in an inlet with much wave action and a dark, rocky bottom
(D) light-shelled snails in a calm inlet with a dark, rocky bottom and many predators
(E) light-shelled snails in a calm inlet with a white, sandy bottom and many predators
[Reveal] Spoiler: OA
BSchool Forum Moderator
User avatar
Status: Flying over the cloud!
Joined: 17 Aug 2011
Posts: 887
Location: Viet Nam
Concentration: International Business, Marketing
GMAT Date: 06-06-2014
GPA: 3.07
Followers: 74

Kudos [?]: 657 [0], given: 44

GMAT ToolKit User Premium Member Reviews Badge
Re: Biology [#permalink]

Show Tags

New post 10 Dec 2011, 02:00
I got A, wrong choice. But now I understand why correct choice is D. Let's I try to reason:

(A) dark-shelled snails in a calm inlet with a dark, rocky bottom and many predators => in calm inlet is contradict with the argument, so wrong
(B) dark-shelled snails in a calm inlet with a white, sandy bottom => calm inlet is also wrong
(C) light-shelled snails in an inlet with much wave action and a dark, rocky bottom => should be dark-shell snails
(D) light-shelled snails in a calm inlet with a dark, rocky bottom and many predators => light in calm inlet. Dark, rocky, and many predators prove this species successfully avoid the recognition of predator. Rocky bottom also help snail absorb more heat from sun than sandy bottom. So, correct one.
(E) light-shelled snails in a calm inlet with a white, sandy bottom and many predators => same reason as A, B, and C.
_________________

Rules for posting in verbal gmat forum, read it before posting anything in verbal forum
Giving me + 1 kudos if my post is valuable with you :)

The more you like my post, the more you share to other's need

CR: Focus of the Week: Must be True Question

Re: Biology   [#permalink] 10 Dec 2011, 02:00
    Similar topics Author Replies Last post
Similar
Topics:
2 Because it was long thought that few people would watch trainspotting 6 23 Jul 2009, 02:11
There is a great deal of geographical variation in the vksunder 0 11 Jul 2008, 06:57
1 Experts publish their posts in the topic People have long been fascinated by the paranormal. Over the neelabhmahesh 7 06 Feb 2008, 22:26
There is a great deal of geographical variation in the tarek99 0 17 Jan 2008, 19:10
There is a great deal of geographical variation in the eyunni 0 27 Dec 2007, 09:43
Display posts from previous: Sort by

Marine biologists have long thought that variation in the

  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®.