It is currently 18 Nov 2017, 22:11

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Guillemots are birds for arctic regions. They feed on fish

Author Message
TAGS:

### Hide Tags

Manager
Joined: 24 Sep 2008
Posts: 187

Kudos [?]: 127 [11], given: 7

Schools: MIT / INSEAD / IIM - ABC
Guillemots are birds for arctic regions. They feed on fish [#permalink]

### Show Tags

07 Aug 2009, 20:39
11
KUDOS
30
This post was
BOOKMARKED
00:00

Difficulty:

85% (hard)

Question Stats:

49% (01:43) correct 51% (01:54) wrong based on 1307 sessions

### HideShow timer Statistics

Guillemots are birds for arctic regions. They feed on fish that gather beneath thin sheets of floating ice, and they nest on nearby lands. Guillemots need 80 consecutive snow free days in a year to raise their chicks, so until avrage temperature in arctic began to rise recently, the guillemots' range was limited to the southernmost arctic coast. Therefore, if the warming continues, the guillemots' range will probably be enlarged by being extended northward along the coast...

Which of the following, if true, most seriously weakens the the argument?

A. Even if the warming trend continues, there will still be years in which guillemots chicks are killed by an unusually early snow.
B. If Arctic warming continues, guillemots' current predators are likely to succeed in extending their own range farther north
C. Guillemots nest in coastal areas, where tempratures are generally higher than inland areas.
D. If the Arctic warming continues much of the thin ice in southern arctic will disappear.
E. The fish that guillemots eat are currently preyed on by wider variety of predators in southernmost arctic regions than they are farther north.
[Reveal] Spoiler: OA

Last edited by GODSPEED on 31 Jul 2012, 00:34, edited 1 time in total.

Kudos [?]: 127 [11], given: 7

Director
Joined: 01 Apr 2008
Posts: 872

Kudos [?]: 860 [0], given: 18

Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

08 Aug 2009, 04:27
D for me.
If the warming continues, the range of the birds will either decrease or remain constant and NOT increase.

Kudos [?]: 860 [0], given: 18

Senior Manager
Affiliations: ACA, CPA
Joined: 26 Apr 2009
Posts: 433

Kudos [?]: 97 [0], given: 41

Location: Vagabond
Schools: BC
WE 1: Big4, Audit
WE 2: Banking
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

08 Aug 2009, 07:41
IMO B

D actually strengthens the argument.
_________________

If you have made mistakes, there is always another chance for you. You may have a fresh start any moment you choose, for this thing we call "failure" is not the falling down, but the staying down.

Kudos [?]: 97 [0], given: 41

Manager
Joined: 07 Jul 2009
Posts: 221

Kudos [?]: 141 [1], given: 13

Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

08 Aug 2009, 18:41
1
KUDOS
I would go with D.

If warming continues and thin ice in southern arctic disappears, birds would be displaced from south to north. So range is not extended.

Kudos [?]: 141 [1], given: 13

Manager
Joined: 24 Sep 2008
Posts: 187

Kudos [?]: 127 [0], given: 7

Schools: MIT / INSEAD / IIM - ABC
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

08 Aug 2009, 21:46
Debated over D & E....E seems to be a strong contender....why not E?

Kudos [?]: 127 [0], given: 7

Senior Manager
Joined: 26 May 2009
Posts: 305

Kudos [?]: 63 [0], given: 13

Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

08 Aug 2009, 23:11
D for me as well

Kudos [?]: 63 [0], given: 13

Director
Joined: 05 Jun 2009
Posts: 807

Kudos [?]: 382 [0], given: 106

WE 1: 7years (Financial Services - Consultant, BA)
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

09 Aug 2009, 00:00
B for me!
_________________

Consider kudos for the good post ...
My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html

Kudos [?]: 382 [0], given: 106

Intern
Joined: 25 Jul 2009
Posts: 42

Kudos [?]: 4 [0], given: 0

Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

09 Aug 2009, 02:30
B for me.

Kudos [?]: 4 [0], given: 0

Manager
Joined: 26 Aug 2005
Posts: 60

Kudos [?]: 9 [0], given: 0

Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

09 Aug 2009, 02:51
i think (a).
the argument depends on the assumption that as warming continues, there will be more 80 conseutive snow-free days which will increase the population. however, going from 40 snow days and 40 snow-free days to 79 snow-free days and 1 snow day is still considered warming, but the chicks won't survive because of that 1 snow day.

Kudos [?]: 9 [0], given: 0

Senior Manager
Affiliations: ACA, CPA
Joined: 26 Apr 2009
Posts: 433

Kudos [?]: 97 [0], given: 41

Location: Vagabond
Schools: BC
WE 1: Big4, Audit
WE 2: Banking
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

09 Aug 2009, 03:05
i think there is too much assumption with this one. Also it is talking about range expansion. The population need not expand for the range to expand.

seongbae wrote:
i think (a).
the argument depends on the assumption that as warming continues, there will be more 80 conseutive snow-free days which will increase the population. however, going from 40 snow days and 40 snow-free days to 79 snow-free days and 1 snow day is still considered warming, but the chicks won't survive because of that 1 snow day.

_________________

If you have made mistakes, there is always another chance for you. You may have a fresh start any moment you choose, for this thing we call "failure" is not the falling down, but the staying down.

Kudos [?]: 97 [0], given: 41

Manager
Joined: 24 Sep 2008
Posts: 187

Kudos [?]: 127 [0], given: 7

Schools: MIT / INSEAD / IIM - ABC
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

12 Aug 2009, 08:27
OA is D.....

Why not E? Can anybody explain? I do have my reasons......but want to be doubly sure.

Cheers!

Kudos [?]: 127 [0], given: 7

Intern
Joined: 10 Jul 2009
Posts: 46

Kudos [?]: 27 [1], given: 4

Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

12 Aug 2009, 10:02
1
KUDOS
GODSPEED wrote:
OA is D.....

Why not E? Can anybody explain? I do have my reasons......but want to be doubly sure.

Cheers!

In the weaken type of question it is important to correctly identify a conclusion and then attack it. It is a mistake to attack premises of the argument (at least for GMAT). in our question the conclusion is:

Therefore, if the warming continues, the guillemots' range will probably be enlarged by being extended northward along the coast...

So the correct answer would be undermining that "the birds' range will be enlarged"
Try to read E. Does the fact that the fish eaten by guillemots is also eaten by other predators in the southernmost (where the bird live now) threaten their existense/spread to the north? NO. Instead it highlights that there more predators in the southernmost and states that the birds will have more food ie less competition in the north. So it sounds more like a supporting answer to me rather than a weakening one.

E. The fish that guillemots eat are currently preyed on by wider variety of predators in southernmost arctic regions than they are farther north.

Hope my clarification was coherent.

Kudos [?]: 27 [1], given: 4

Manager
Status: Dream big, work hard, and drink gallons of beer!
Joined: 11 Jun 2011
Posts: 204

Kudos [?]: 60 [0], given: 33

Concentration: Finance, General Management
GMAT Date: 10-01-2011
WE: Web Development (Consulting)
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

28 Jul 2011, 22:11
Trickiest question ever..
_________________

If I look absent-minded or insane, I am just living a dream of being successful. If you still wonder why I am like this, you have no idea how success tastes like!

Kudos [?]: 60 [0], given: 33

Senior Manager
Joined: 08 Jun 2010
Posts: 387

Kudos [?]: 102 [0], given: 13

Location: United States
Concentration: General Management, Finance
GMAT 1: 680 Q50 V32
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

29 Jul 2011, 05:47
The keyword here is snow free not snow filled.. Haha

Posted from my mobile device

Kudos [?]: 102 [0], given: 13

Manager
Joined: 24 Jun 2011
Posts: 51

Kudos [?]: 9 [0], given: 6

Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

29 Jul 2011, 06:15
E) actually strengthens right? It says in the southernmost region there are more predators than in north. All the more reason to move north for the guillemots as is put forward by the claim.

Kudos [?]: 9 [0], given: 6

VP
Joined: 24 Jul 2011
Posts: 1354

Kudos [?]: 651 [4], given: 20

GMAT 1: 780 Q51 V48
GRE 1: 1540 Q800 V740
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

29 Jul 2011, 06:42
4
KUDOS
2
This post was
BOOKMARKED
Lets analyze the answer choices and see which one stands scrutiny. To find the choice which weakens the argument, we need to select the choice that provides evidence that the birds' range will not be extended.

(A): The keyword here is 'still'. If there are years now when the chicks are being killed by early snow, has it wiped out the birds? No. Therefore if conditions are favorable it cannot act as an impediment to their range expansion. Incorrect.
(B): Guillemots have been co-existing with their predators where they currently live. If the predators migrate northwards, why will this stop the birds from doing so too? Incorrect.
(C): If temperatures are rising then they will be higher than they are now in inland areas too, possibly allowing the birds to live there. Incorrect.
(D): CORRECT. If the ice in the southern arctic disappears, the birds will be forced to move northwards. However, their RANGE will not be extended as they will just shift from a more southern to a more northern point. There is no evidence that says that they will live over longer stretches of land.
(E): This means there will be more fish for the birds to eat in the North. This supports the conclusion that they will move north and extend their range.
_________________

GyanOne | Top MBA Rankings and MBA Admissions Blog

Premium MBA Essay Review|Best MBA Interview Preparation|Exclusive GMAT coaching

Get a FREE Detailed MBA Profile Evaluation | Call us now +91 98998 31738

Kudos [?]: 651 [4], given: 20

Manager
Joined: 26 Sep 2010
Posts: 107

Kudos [?]: 9 [0], given: 0

GMAT 1: 680 Q49 V34
GPA: 3.65
Re: Guillemots are birds for arctic regions - OG11E [Diag 26] [#permalink]

### Show Tags

07 Aug 2011, 03:19
go with D

Kudos [?]: 9 [0], given: 0

Intern
Joined: 27 Jun 2013
Posts: 3

Kudos [?]: 7 [2], given: 14

Location: United States
GPA: 4
Re: Guillemots are birds for arctic regions. They feed on fish [#permalink]

### Show Tags

30 Jun 2013, 06:04
2
KUDOS
an explanation could be since the premise says "Guillemots are birds for arctic regions. They feed on fish that gather beneath thin sheets of floating ice, and they nest on nearby lands." --> D suggests that if this ice has melted, it becomes easier to feed on fishes hence no reason to move northward

Kudos [?]: 7 [2], given: 14

Manager
Joined: 26 Sep 2013
Posts: 218

Kudos [?]: 181 [0], given: 40

Concentration: Finance, Economics
GMAT 1: 670 Q39 V41
GMAT 2: 730 Q49 V41
Re: Guillemots are birds for arctic regions. They feed on fish [#permalink]

### Show Tags

01 Oct 2013, 18:02
ashwintthomas wrote:
an explanation could be since the premise says "Guillemots are birds for arctic regions. They feed on fish that gather beneath thin sheets of floating ice, and they nest on nearby lands." --> D suggests that if this ice has melted, it becomes easier to feed on fishes hence no reason to move northward

I read it as they feed on fish that gather beneath thin sheets of floating ice; if those sheets of ice disappear then so too do those fish they feed on. This would actually prevent them from expanding their range.

Kudos [?]: 181 [0], given: 40

Intern
Joined: 05 Sep 2012
Posts: 9

Kudos [?]: 10 [1], given: 4

Location: Viet Nam
GMAT 1: 560 Q49 V19
GPA: 3.2
WE: Investment Banking (Investment Banking)
Re: Guillemots are birds for arctic regions. They feed on fish [#permalink]

### Show Tags

01 Oct 2013, 20:34
1
KUDOS
1
This post was
BOOKMARKED
I choose D.
First, I will break down the stimulus.
Premise 1: Guillemots feed on fish beneath thin sheets of floating ice, and nest on nearby lands.
Premise 2: Guillemots need 80 consecutive snow free days to raise their chicks, presently, the guillemots' range was limited to the southernmost arctic coast.
Conclusion: if the warming continues, the guillemots' range will probably be enlarged by being extended northward along the coast.
We can see that this is a Cause n Effect reasoning. The warming => the guillemots' range will probably be enlarged by being extended northward

This is a weaken question type and we must identify an answer which shows that when the cause occurs, the effect doesnt occur or reversely or find an alternative cause for the effect...just as the method of CR Bible.
A) Even if the warming trend continues, there will still be years in which guillemots chicks are killed by an unusually early snow.
=> This doesnt effect the conclusion much because the conclusion tells us the guillemots come to grow in the northward.
B) If Arctic warming continues, guillemots' current predators are likely to succeed in extending their own range farther north
=> It is too far if we infer that guillemots' current predators succeeded in moving farther north and control the population of the guillemots there. And in this answer, the word is "likely" not "surely".
C) Guillemots nest in coastal areas, where tempratures are generally higher than inland areas.
=> OOS. The argument makes no statement about inland areas or any comparision between inland n costal areas.
D) If the Arctic warming continues much of the thin ice in southern arctic will disappear.
=> Thin ice disappear => birth moves from south to north, So, the guillemots' range wont be enlarged. This shows that when the cause occurs the effect doesnot occur. So it is a Contender.
E) The fish that guillemots eat are currently preyed on by wider variety of predators in southernmost arctic regions than they are farther north.
=> This actually strengthens the argument. Because the fish is more abundant in the north. if the birds move to the north, they will surely enlarge their range.

Hope it helps.

Kudos [?]: 10 [1], given: 4

Re: Guillemots are birds for arctic regions. They feed on fish   [#permalink] 01 Oct 2013, 20:34

Go to page    1   2    Next  [ 34 posts ]

Display posts from previous: Sort by