GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 17 Jan 2019, 10:14

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 in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winning strategy for a high GRE score

     January 17, 2019

     January 17, 2019

     08:00 AM PST

     09:00 AM PST

    Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.
  • Free GMAT Strategy Webinar

     January 19, 2019

     January 19, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

Every fall Croton's jays migrate south. The jays always join flocks of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Manager
Manager
avatar
Joined: 16 Feb 2009
Posts: 51
Schools: Anderson FEMBA
Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post Updated on: 18 Dec 2018, 02:50
5
16
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

73% (01:03) correct 27% (01:25) wrong based on 1010 sessions

HideShow timer Statistics

Every fall Croton's jays migrate south. The jays always join flocks of migrating crookbeaks with which they share the same summer and winter territories. If a jay becomes separated from the crookbeaks it is accompanying, it wanders until it comes across another flock of crookbeaks. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own.

Which of the following, if true, most strengthens the argument above?


(A) Croton's jays lay their eggs in the nests of crookbeaks, which breed upon completing their southern migration.

(B) The three species most closely related to crookbeaks do not migrate at all.

(C) In the spring, Croton's jays migrate north in the company of Tattersall warblers.

(D) Species other than Croton's jays occasionally accompany flocks of migrating crookbeaks.

(E) In the spring, crookbeaks migrate north before Croton's jays do.

Originally posted by AndersonBound on 16 Feb 2009, 23:36.
Last edited by Bunuel on 18 Dec 2018, 02:50, edited 2 times in total.
Edited the question.
Most Helpful Community Reply
Intern
Intern
avatar
Joined: 07 Dec 2009
Posts: 12
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 28 Dec 2009, 18:08
6
1
Here is why the answer is C.

The premise they want us to strengthen is that these C Jay birds lack the ability to find their way on their own. C is the only one that strengthes this premise.

C says (C) In the spring, Croton’s jays migrate north in the company of Tattersall warblers.

If these birds also migrate following another type of bird this supports the premise that they cannot find the way on their own.

The reason it is not A is because -

A says Croton’s jays lay their eggs in the nest of crookbeaks, which breed upon completing their southern migration. Well, this provides a different reason as to why they would follow the crookbreaks. They might be following them because they are waiting for their young to be born, not because they lack the navigational ability to find their way south on their own.


The reason it is not B is because -
B says B) The three species of most closely related to crookbeaks do not migrate at all

This is irelevant and has nothing to do with the argument.

The reason it is not D is because -

D says, (D) Species other than Croton’s jays occasionally accompany flocks of migrating crookbeaks.

This statement does not strengthen the premise that Croton Jays' can't follow directions. It actually weaknes that premise because it shows that other birds also follow these birds, so it is not a specific condition for the the C Jays.

E is not the answer, because it is not relevant to the question

I hope these help explanations help!
General Discussion
Manager
Manager
avatar
Joined: 16 Feb 2009
Posts: 51
Schools: Anderson FEMBA
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 17 Feb 2009, 10:01
Quote:
In the spring, crookbeaks migrate north before Croton's jays do.


Wouldn't E indicate that CJs follow CB up north?
VP
VP
User avatar
Joined: 05 Jul 2008
Posts: 1267
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 17 Feb 2009, 10:06
2
AndersonBound wrote:
Quote:
In the spring, crookbeaks migrate north before Croton's jays do.


Wouldn't E indicate that CJs follow CB up north?


Before does not signify whether they are in the vision of CJ's to follow.

If they migrate a month before, CJ cannot see the CB, unless CB moves an inch a day.

if they migrate 10 min before, CJ possibly can see CB in the air and follow them for navigation.

Also the Q is clearly about moving together. not before/behind.
Intern
Intern
User avatar
Joined: 23 Dec 2009
Posts: 39
Schools: HBS 2+2
WE 1: Consulting
WE 2: Investment Management
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 28 Dec 2009, 14:13
1
I narrowed it down to C and D, and picked C based on the assumption that the jays always need someone to migrate with, hence,

Conclusion: The jays can't navigate south on their own.
Evidence: Share migration with crookbeaks, if jay is lost :: jay finds crookbeaks
Assumption: The jays always migrate with birds of a differing species.

Not sure if this is entirely the correct reasoning...guess I would've been a little lucky. :lol:
_________________

My GMAT quest...

...over!

Manager
Manager
avatar
Joined: 19 Jul 2011
Posts: 91
Concentration: Finance, Economics
Schools: Duke '15
GPA: 3.9
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 25 Aug 2011, 06:28
1
Since I'm not a native speaker, I really can't understand the latter part in A "which breed upon completing their southern migration." what does this mean? Appreciated if anyone care to help!!

It means they reproduce after they have completed their journey. i.e have sex and give birth
_________________

Show Thanks to fellow members with Kudos its shows your appreciation and its free

Retired Moderator
avatar
Joined: 20 Dec 2010
Posts: 1810
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 25 Aug 2011, 10:49
2
1
DeeptiM wrote:
C talks about Tattersall warblers...which is not even mentioned in the passage...

pls help understand how did you choose C


A term, noun or a premise can be introduced from outside in case of weaken and strengthen type questions. C strengthens the author's conclusion that Croton's jays lack navigational skill to travel south by showing that they don't need crookbeaks for anything else except for the navigation. The hint is provided by showing that Croton's jays follow another species altogether to travel north because they also take them to their destination. The only concern I had was the word "north"; the argument talks about south. However, if we just generalize the conclusion by saying that the jays lack migrating navigation skill altogether, C fits in.

"A" weakens the argument by showing an alternate reason for tailgating. It says; no-no, jays follow crookbeaks because they need a place to usher their eggs, not because they need navigation.

"B" talks about a completely out of scope fact. Croton jays are not even mentioned.

"D" doesn't say anything about Croton's jays. We need to know whether jays need navigation and here's "D", talking about other species that don't concern the problem in hand.

"E" says crookbeaks migrate north in spring. Conclusion is about the lacking navigational skill to travel South. At best, it actually weakens the argument by suggesting that jays will travel north without crookbeaks help. But, who knows if they have some other buddies who can help them get to north; someone like Tattersall warblers. However, we shouldn't assume that.

Ans: "C"
_________________

~fluke

GMAT Club Premium Membership - big benefits and savings

Manager
Manager
User avatar
Joined: 12 Dec 2010
Posts: 230
Concentration: Strategy, General Management
GMAT 1: 680 Q49 V34
GMAT 2: 730 Q49 V41
GPA: 4
WE: Consulting (Other)
Reviews Badge
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 29 Aug 2011, 00:54
1
sleepysnowy wrote:
Every fall Croton's jays migrate south. The jays always join flocks of migrating crookbeaks with which they share the same summer and winter territories. If a jay becomes separated from the crookbeaks it is accompanying, it wanders until it comes across another flock of crookbeaks. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own.

Which of the following, if true, most strengthens the argument above?
A. Croton's jays lay their eggs in the nests of crookbeaks, which breed upon completing their southern migration.- Does it work in any way to strengthen ?
B. The three species most closely related to crookbeaks do not migrate at all.-So what ? does not convey the message, at best left us more confusecd!
C. In the spring, Croton's jays migrate north in the company of Tattersall warblers.- This some ways shows it requires some ones else company to move around- so proabable, keep it
D. Species other than Croton's jays occasionally accompany flocks of migrating crookbeaks.- we are not looking for anything other than C Jay's or are we ?
E. In the spring, crookbeaks migrate north before Croton's jays do.- same reason as D

Since I'm not a native speaker, I really can't understand the latter part in A "which breed upon completing their southern migration." what does this mean? Appreciated if anyone care to help!! - crookbeaks do breeding after migrtaing to south. Anyways this was not any issue I guess while solving the question


So C seems to be the best available option!
_________________

My GMAT Journey 540->680->730!


~ When the going gets tough, the Tough gets going!

Manager
Manager
User avatar
Status: Enjoying the MBA journey :)
Joined: 09 Sep 2011
Posts: 131
Location: United States (DC)
Concentration: General Management, Entrepreneurship
GMAT 1: 710 Q49 V38
WE: Corporate Finance (Other)
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 11 Nov 2011, 10:01
2
Here's the explanation:

The conclusion of the given argument is that 'Croton's jays lack the navigational ability to find their way south on their own'. The question asks us to strengthen the argument and hence this conclusion. Which of the given options would prove that the Croton's jays, indeed lack the navigational ability to find their way (south, north or any other direction)?

Option C clearly supports our conclusion by stating that the Croton's jays migrate north in the company of Tattersall warblers and it has already been given in the premise that Croton's jays always join flocks of migrating crookbeaks to travel south. Hence this option, along with the given premise supports the conclusion that Croton's jays indeed lack the navigational ability to find their way.

The other four options are clearly out of scope of the given argument.

Hope this helps.
_________________

MBA Candidate 2015 | Georgetown University
McDonough School of Business

Intern
Intern
avatar
Joined: 09 Oct 2011
Posts: 21
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 16 May 2015, 03:46
Every fall Croton's jays migrate south. The jays always join flocks of migrating crookbeaks with which they share the summer and winter territories. If a jay becomes separated from the crookbeaks it is accompanying, it wanders until it comes across another flock of crookbeaks. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own.

Which of the following, if true, most strengthens the argument above?
A - Croton's jays lay their eggs in the nest of crookbeaks, which breed upon completing their southern migration.
B - The three species of most closely related to crookbeaks do not migrate at all.
C - In the spring, Croton's jays migrate north in the company of Tattersall warblers.
D - Species other than Croton's jays occasionally accompany flocks of migrating crookbeaks.
E - In the spring, crookbeaks migrate north before Croton's jays do.

What need to find = most strengthens the argument above

conclusion words ----clearly , therefore

Conclusion ----. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own.

Need to emphasis on conclusion ----let's discuss each given statement


A - Croton's jays lay their eggs in the nest of crookbeaks, which breed upon completing their southern migration.

conclusion is on navigational ability to find the way in the argument , which needs to be strengthens ,while statement A emphasis on the habit of CJ laying eggs in the nest of crookbeaks


B - The three species of most closely related to crookbeaks do not migrate at all.

Premises is about only CJ and Crookbeaks , which are specific in the argument , while three species are general ---not related to argument


C - In the spring, Croton's jays migrate north in the company of Tattersall warblers.


migrate north in the company ------Croton's jays lack the navigational ability to find their way south on their own , means CJ Needs company to reach ----strength


D - Species other than Croton's jays occasionally accompany flocks of migrating crookbeaks.

Species other than Croton's-----out of scope , argument is about CJ

E - In the spring, crookbeaks migrate north before Croton's jays do.

look at word ---Before ---To strengthen we need together or accompany

Answer c
Manager
Manager
avatar
Joined: 22 Jun 2016
Posts: 50
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 29 Aug 2016, 12:50
Option C never says about south and is not a good contender for answer. It does not give thought whether Jays cannot travel to south with out help.

Option E says Crookbeaks travel with out Jays, means Jays may or may not require some one to take them to North but they require some one to take to South.

Not able to understand how Option C is better than Option E.
Board of Directors
User avatar
P
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4330
Location: India
GPA: 3.5
WE: Business Development (Commercial Banking)
GMAT ToolKit User Premium Member CAT Tests
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 30 Aug 2016, 11:11
ravikrishna1979 wrote:
Option C never says about south and is not a good contender for answer. It does not give thought whether Jays cannot travel to south with out help.

Option E says Crookbeaks travel with out Jays, means Jays may or may not require some one to take them to North but they require some one to take to South.

Not able to understand how Option C is better than Option E.



Crotons (Lack the navigational ability) ---------follow ------> Crookbeaks


E. In the spring, crookbeaks migrate north before Croton's jays do.

If crookbeaks migrate before Crotons , we cannot state whether Croton will reach their destination/not, hence this doesn't strengthen the conclusion...

To strengthen the conclusion " Croton's jays lack the navigational ability to find their way south on their own." we need a statement to show that the Crotons are dependent on the crookbeaks for navigation/migration and only (C) does it perfectly.
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Intern
Intern
avatar
B
Joined: 22 Jul 2016
Posts: 23
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 07 Jan 2017, 05:52
To prove : Croton's jays lack the navigational ability to find their way south on their own.

As mentioned in the passage, Croton's jay is dependent on crookbeaks for migration to south.
If we are able to find some clue which suggests that the Croton's jay needs the same kind of help in migration, then that will help to strengthen the argument.
option (C) suggests the same.

Ans : C
Director
Director
User avatar
G
Joined: 04 Sep 2015
Posts: 525
Location: India
WE: Information Technology (Computer Software)
Premium Member Reviews Badge CAT Tests
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 16 Jan 2017, 10:41
Every fall Croton's jays migrate south. The jays always join flocks of migrating crookbeaks with which they share the same summer and winter territories. If a jay becomes separated from the crookbeaks it is accompanying, it wanders until it comes across another flock of crookbeaks. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own.

Which of the following, if true, most strengthens the argument above?
A. Croton's jays lay their eggs in the nests of crookbeaks, which breed upon completing their southern migration.
Out of scope
B. The three species most closely related to crookbeaks do not migrate at all.
out of scope
C. In the spring, Croton's jays migrate north in the company of Tattersall warblers.
Correct choice that strenthens the conclusion of the argument that says that Croton's jays lack navigational ability.
D. Species other than Croton's jays occasionally accompany flocks of migrating crookbeaks.
Out of scope
E. In the spring, crookbeaks migrate north before Croton's jays do.
weakens the argument
Manager
Manager
User avatar
B
Joined: 14 Feb 2017
Posts: 122
Location: Australia
Concentration: Technology, Strategy
GMAT 1: 560 Q41 V26
GMAT 2: 550 Q43 V23
GPA: 2.61
WE: Management Consulting (Consulting)
CAT Tests
Re: Every fall Croton's jays migrate south. The jays always join flocks of  [#permalink]

Show Tags

New post 08 Dec 2018, 22:28
(C) In the spring, Croton's jays migrate north in the company of Tattersall warblers.

I narrowed it down to (C) and (E) and chose E because "migrate north in the company" shows that the Crotons migrate together with another species, indicating they may not necessarily be able to navigate themselves.

(E) In the spring, crookbeaks migrate north before Croton's jays do.
Versus (E), I initially interpreted that the Crotons follow the Crookbeaks after they migrate, BUT that is a massive assumption as "migrate" is a synonym for journey. So if Crotons follow the Crookbeaks AFTER they migrate, then it means they are travelling alone and thus able to navigate. This is a 180 degree option. I.e. it Weakens the Conclusion.
GMAT Club Bot
Re: Every fall Croton's jays migrate south. The jays always join flocks of &nbs [#permalink] 08 Dec 2018, 22:28
Display posts from previous: Sort by

Every fall Croton's jays migrate south. The jays always join flocks of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.