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

It is currently 29 Aug 2014, 04:21

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

Two decades after the Emareld River Dam was built, none of

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
User avatar
Joined: 19 Oct 2004
Posts: 320
Location: Missouri, USA
Followers: 1

Kudos [?]: 7 [0], given: 0

GMAT Tests User
Two decades after the Emareld River Dam was built, none of [#permalink] New post 02 Nov 2004, 11:39
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 2 sessions
Two decades after the Emareld River Dam was built, none of the eight fish species native to the Emareld River was still reproducing adequately in the river below the dam. Since the dam reduced the annual range of water temperature in the river below the dam from 50 degrees to 6 degrees, scientists have hypothesixed that sharply rising water temperature must be invloved in signaling the native species to begin the reproductive cycle.

Which of the following statements, if true, would most strengthen the scientist's hypothesis?

A. The native fish species were still able to reproduce only in the side streams of the river below the dam where the annual temperature range remains approximately 50 degrees.

B. Before the dam was built, the Emareld River annually overflowed its banks, creating backwaters that were critical breeding areas for the native species of fish.

C. The lowest recorded temperature of the Emareld River before the dam was built was 34 degrees whereas the lowest recorded temperature of the river after the damn was built has been 43 degrees.

D. Nonnative species of fish introduced into the Emareld River after the dam was built, have begun competing with the declining native fish species for food and space.

E. Five of the fish species native to the Emareld River are not native to any other river in North America.
_________________

Let's get it right!!!!


Last edited by ruhi on 02 Nov 2004, 13:09, edited 1 time in total.
Manager
Manager
User avatar
Joined: 21 Jul 2004
Posts: 121
Followers: 1

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

GMAT Tests User
 [#permalink] New post 02 Nov 2004, 13:03
I will go w/ A.

A, A provides sort of the "control" group
Senior Manager
Senior Manager
User avatar
Joined: 19 Oct 2004
Posts: 320
Location: Missouri, USA
Followers: 1

Kudos [?]: 7 [0], given: 0

GMAT Tests User
 [#permalink] New post 03 Nov 2004, 10:53
could you please explain why is it A??

OA is A, but i couldnt understand clearly.
_________________

Let's get it right!!!!

Manager
Manager
User avatar
Joined: 21 Jul 2004
Posts: 121
Followers: 1

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

GMAT Tests User
 [#permalink] New post 03 Nov 2004, 11:57
let me try to explain.... i am not very good at explaining... :(

The argument stated that the inadequate reprouctive cycle is caused by the change in water temperature (decrease). However, there could be other reasons that might cause the inadequate reproductive cycle. Choice A actually proves that temperature is the cause because the same fish species that live in where the temperature remains unchanged are able to reproduce.

Choice A strenghten the hypothesis because with everything else being equal, temperature would be the cause of the abnormal reproductive cycle.


Hope this helps....
SVP
SVP
User avatar
Joined: 16 Oct 2003
Posts: 1816
Followers: 4

Kudos [?]: 35 [0], given: 0

GMAT Tests User
 [#permalink] New post 03 Nov 2004, 12:21
A reinforces the statement that adequate reproduction is possible even in the same river where the temperature is 50 degrees
  [#permalink] 03 Nov 2004, 12:21
    Similar topics Author Replies Last post
Similar
Topics:
9 Experts publish their posts in the topic Two decades after the Dead Sea Barrier was built, none of Archit143 9 20 Feb 2013, 05:23
Damming the Merv River would provide irrigation for the dry nonameee 6 08 Jul 2011, 03:57
2 Two decades after the Emerald River Dam was built, none of noboru 7 03 May 2010, 13:15
Building the Glenn Canyon dam on the Colorado river caused x97agarwal 9 02 Aug 2008, 10:03
Two decades after the Emerald River Dam was built, none of lexis 14 20 Jun 2008, 01:56
Display posts from previous: Sort by

Two decades after the Emareld River Dam was built, none of

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.