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

It is currently 17 Jul 2018, 11:43

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

Recently documented examples of neurogenesis, the production of new br

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

Hide Tags

23 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 27 Aug 2005
Posts: 329
Location: Montreal, Canada
Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post Updated on: 17 Jun 2018, 01:39
23
85
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

55% (00:56) correct 45% (01:07) wrong based on 1231 sessions

HideShow timer Statistics

Source : GMATPrep Default Exam Pack

Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

(A) the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that

(B) mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they

(C) mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they

(D) the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they

(E) brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

https://www.nytimes.com/2000/01/04/science/a-decade-of-discovery-yields-a-shock-about-the-brain.html

The new cells seen in the rat brains appear at a higher rate after challenges like intense training, injury or an infection, Dr. Raastad said. Within a few years, researchers found the cells in adult mice, guinea pigs, rabbits and monkeys. In the mid-1980's, other researchers found irrefutable evidence that new cells were born in the brains of adult canaries learning new songs and chickadees that were remembering where they had stashed their winter seeds. But researchers still did not believe that new cells were created in human brains, Dr. Raastad said.

In 1997, Dr. Elizabeth Gould, an assistant professor of neuroscience at Princeton, and colleagues showed that neurogenesis, or the birth of new cells, occurred in the hippocampuses of tree shrews and marmoset monkeys. But Dr. Rakic and others said this was not possible in humans.

In 1998, Dr. Gage demonstrated that the number of brain cells in the hippocampuses of mice raised in stimulating environments increased by 15 percent -- and that the cells were born in the ventricle zone.

Originally posted by coffeeloverfreak on 06 Sep 2005, 21:14.
Last edited by hazelnut on 17 Jun 2018, 01:39, edited 4 times in total.
Formatted the Q.
Most Helpful Expert Reply
Expert Post
16 KUDOS received
Manhattan Prep Instructor
User avatar
S
Joined: 22 Mar 2011
Posts: 1289
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 21 Jul 2012, 14:00
16
3
The first thing to notice here is that we are looking for examples of neurogenesis. Because neurogenesis is an activity, a kind of growth, neither mice nor their brains can be an example of neurogenesis. We can eliminate A - C for this reason. We can eliminate D because it has a modifier error. "When placed" is an adverbial modifier, and should therefore modify an action or clause. For instance, we might say "When placed in a stimulating environment, mice grow new brain cells," or "Mice grow new brain cells when placed in a stimulating environment." All we have to modify here is a noun phrase--"the brain growth"--so we should not use an adverbial modifier. Note that we have the same modifier in A, but it is wrong for a slightly different reason. There, we have "the brain growing," which can be interpreted as an action, but now when we apply "when placed in a stimulating environment," it looks like we are saying that [i]the brain,[i] rather than the mouse, is being placed in that environment.

Note that in E, we have a noun modifier--"that are placed in a stimulating environment." This correctly modifies "mice." In turn, the phrase "in mice" correctly modifies "brain growth" to provide an example of neurogenesis. The parallel portion about canaries works in exactly the same way.
_________________


Dmitry Farber | Manhattan GMAT Instructor | New York


Manhattan GMAT Discount | Manhattan GMAT Course Reviews | View Instructor Profile |
Manhattan GMAT Reviews

Most Helpful Community Reply
20 KUDOS received
Director
Director
avatar
Joined: 11 Mar 2005
Posts: 703
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 07 Sep 2005, 14:05
20
10
Almost everyone is going with 4. From my poin of view that is wrong. Here is how....

the brain growth in mice when placed (what is placed mice or brain growth) a stimulating environment or the increase in canaries' neurons when they (what does THEY refer to here. They is a pronoun that should refer to a noun, in this case the noun is canaries' neurons. Remember canaries' is in possessive form here).

5 resolves it all.

mice is a plural of mouse(singular).

brain growth in mice that are placed in a stimulating environment
or an increase in neurons in canaries that learn new songs.

I may be wrong because my brain is disfunctional these days....
General Discussion
15 KUDOS received
Manager
Manager
User avatar
Joined: 30 Jan 2006
Posts: 141
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 08 Apr 2006, 13:13
15
6
OA is E!

Interesting that nobody got it right :? My answer was B when I first saw this SC.

This is what happens (according to me): it parallels examples of the production of new brain cells, i.e. nouns or noun phrases. However, the trick is the modifiers following these noun/noun phrases. The modifiers are either subordinate clauses or relative clauses. One should read the options with the modifying clauses in mind and correct accordingly.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that

- the modifying clauses are not parallel.

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they

- incorrect use of mice and canaries as examples (examples need to be of the production of new brain cells). Also, ambiguous use of they

C. mice’s brain that grow when they are placed in a stimulating environment or canaries’ neurons that increase when they

- incorrect use of mice's brain and canaries' neurons as examples. Also, ambiguous use of they in the second example

D. the brain growth in mice when placed in a stimulating environment or the increase in canaries’ neurons when they

- the examples are not parallel (canaries' neurons is in possessive form whereas the brain growth is not). Also, the modifying clauses are ambigious. E.g., they in the second example

E. brain grown in mice that are placed in a stimulating environment or increase in neurons in canaries that

- the examples and the modifying clauses are parallel.


Let me know if anyone is of a different opinion...
Intern
Intern
avatar
B
Joined: 08 Jan 2017
Posts: 16
GMAT 1: 750 Q51 V40
GPA: 3
Reviews Badge
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 08 Apr 2006, 13:32
What is wrong with D.
I rejected E as it stated "neuron growth in canaries that sing", which seems to alter the meaning.


souvik101990 please suggest.
VP
VP
avatar
Joined: 17 Feb 2010
Posts: 1278
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 24 Mar 2010, 08:33
I would pick (E).

Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that - brain growing in mice is awkward - wrong
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they - they seems to be refering to brains and neurons - wrong
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they - they seems to be refering to mice's brains and canaries' neurons - wrong
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they - they refering to canaries' neurons - wrong
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that - correct - mice are placed in stimulating and canaries that learn new songs - clear
1 KUDOS received
SVP
SVP
User avatar
S
Joined: 14 Apr 2009
Posts: 2209
Location: New York, NY
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 06 Jul 2011, 20:19
1
4
Baten80 wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that



Here the answer is E. Let me show you how.

This is a split sentence. Basically in the form of [main sentence, description, main sentence]

Just take out the description in the middle and read it like this:

Recently documented examples of neurogenesis include [A] or .

From this alone, you should be able to eliminate (A), (B), and (C) just be reading the first three words of each answer choice.

(A): the brain growing
(B): mice whose brains
(C): mice's brains

None of these work because they are not structured correctly as examples.

[b](D) and (E) are closer to what we want--either "the brain growth" or "brain growth"


The only difference between (D) and (E) is "when placed" versus "that."
"When placed" seems to suggest a more specific condition whereas "that" seems more general and a description of a state of being--more of what we're looking for.

Also, if you were to guess--choose the shorter answer choice--the one with fewer words---that would be (E).

Either way, the one you want here is (E) because it correctly begins with "brain growth in mice"--which is an example of a documented example of neurogenesis. And it's consistent with the second part of the sentence.

Therefore, the answer is (E).
1 KUDOS received
Manager
Manager
User avatar
Status: GMAT BATTLE - WIN OR DIE
Joined: 02 May 2011
Posts: 131
Concentration: General Management, Entrepreneurship
GMAT Date: 12-22-2011
GPA: 3.81
WE: General Management (Hospitality and Tourism)
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 28 Jul 2011, 05:00
1
A. Incorrect - the brain growing in mice when placed in a stimulating environment
B. Incorrect - they can refer to canaries or neurons
C. Incorrect - canaries' neurons that increase when they learn new songs
D. Incorrect - neurons when they learn new songs
E. Correct

Baten80 wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
Expert Post
4 KUDOS received
Magoosh GMAT Instructor
User avatar
Joined: 28 Nov 2011
Posts: 303
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 01 Aug 2012, 18:56
4
2
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that

Seems like the 'brain' is being disembodied and placed in a stimulating environment.

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they

The 'they' is ambiguous in both cases: it could refer to 'brains' or 'mice', and in the second case it could refer to 'neurons' or 'canaries.'

C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they

Same pronoun ambiguity with 'they.'

D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they

Sounds as if the 'brain growth' is placed in a stimulating environment.

E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

The pronoun ambiguity issue is cleared up here: 'that' clearly refers to 'mice' and the second 'that' refers to canaries. Therefore (E) is the answer.
_________________

Christopher Lele
Magoosh Test Prep


Image

Image

Intern
Intern
avatar
Joined: 23 Oct 2012
Posts: 20
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 04 Aug 2012, 08:23
nice question sanju ..can u elucidate the difference b/w D and E
Expert Post
3 KUDOS received
e-GMAT Representative
User avatar
G
Joined: 02 Nov 2011
Posts: 2549
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 23 Oct 2012, 09:23
3
1
athirasateesh wrote:
nice question sanju ..can u elucidate the difference b/w D and E


Hi there,

Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

Here is the difference between choice D and choice E:

Choice D: the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they: According to this choice, “brain growth” is placed in a stimulating environment. This is illogical because it is the mice that are put in such environment. Again, pronoun “they” refers to “neurons”, meaning that neurons learn new songs. This is illogical. Note that pronoun “they” cannot refer to “canaries’” because it is an adjective an not a noun. For these reasons choice D is incorrect.

Choice E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that: Correct. In this choice, the first “that” correctly refers to “mice” and the second “that” to “canaries”.

Hope this helps. :)
Thanks.
Shraddha
_________________












| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Manager
Manager
avatar
Joined: 02 Sep 2012
Posts: 225
Location: United States
Concentration: Entrepreneurship, Finance
GMAT Date: 07-25-2013
GPA: 3.83
WE: Architecture (Computer Hardware)
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 06 Feb 2013, 23:58
Recently documented examples of neurogenesis, the production of new brain cells, include brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that learn new songs.
Here the sentence above is corret but i wanted to know how the "brain growth in mice that are placed in a stimulating is corrct!! Becoz brain growth which is singular the how come plural are fits into the sentence ..can some one pls calrify ..
_________________

"Giving kudos" is a decent way to say "Thanks" and motivate contributors. Please use them, it won't cost you anything

1 KUDOS received
VP
VP
User avatar
Status: Been a long time guys...
Joined: 03 Feb 2011
Posts: 1264
Location: United States (NY)
Concentration: Finance, Marketing
GPA: 3.75
GMAT ToolKit User Premium Member
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 07 Feb 2013, 00:22
1
skamal7 wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that learn new songs.
Here the sentence above is corret but i wanted to know how the "brain growth in mice that are placed in a stimulating is corrct!! Becoz brain growth which is singular the how come plural are fits into the sentence ..can some one pls calrify ..


Recently documented examples of neurogenesis, the production of new brain cells, include brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that learn new songs.

Here in the sentence, I am not considering the extra info. The sentence becomes: Recently documented examples of neurogenesis include brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that learn new songs.

See here, the issue is meaning. Ask yourself-is it possible to keep the "brain growth" in a stimulating environment? IMO its illogical. Now again ask yourself- is it possible to keep the mice in stimulating environment? Perhaps yes.
Here the "that" refers to mice and not the "brain growth".

Hope that helps.
_________________

Prepositional Phrases Clarified|Elimination of BEING| Absolute Phrases Clarified
Rules For Posting
www.Univ-Scholarships.com

Expert Post
Senior Manager
Senior Manager
User avatar
Status: Making every effort to create original content for you!!
Joined: 23 Dec 2010
Posts: 480
Location: United States
Concentration: Healthcare, Social Entrepreneurship
GMAT 1: 660 Q48 V34
GMAT 2: 750 Q49 V42
GMAT ToolKit User Premium Member
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 07 Feb 2013, 06:09
skamal7 wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that learn new songs.
Here the sentence above is corret but i wanted to know how the "brain growth in mice that are placed in a stimulating is corrct!! Becoz brain growth which is singular the how come plural are fits into the sentence ..can some one pls calrify ..


Hi Skamal,

Good explanations above by Marcab and anshunadir. Adding another way to understand the relative clause.

For understanding lets remove the that clauses.

original sentence: Recently documented examples of neurogenesis, the production of new brain cells, include brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that learn new songs.

Recently documented examples of neurogenesis, the production of new brain cells, include brain growth in mice or an increase in neurons in canaries.

the "that clause" after mice is providing additional information about mice. ie where they are placed or in what environment the experiment takes place. The other "that clause" provides additional information about canaries.

Hope that helps

Vercules
_________________

Press Kudos if you want to say thanks

Ultimate Reading Comprehension Encyclopedia | Ultimate Sentence Correction Encyclopedia | GMAT Prep Software Analysis and What If Scenarios -- VERBAL | GMAT Prep Software Analysis and What If Scenarios -- IR

Please Read and Follow the 9 Rules of Posting in Verbal Forum

1 KUDOS received
Manager
Manager
User avatar
Joined: 05 Jun 2013
Posts: 57
GMAT 1: 740 Q50 V40
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 03 Dec 2013, 12:05
1
coffeeloverfreak wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that


IMO -That refers to things

in option E 'that' refers to mice & canaries

So can 'that' refers to living creatures and things except People?

Also in option B we have ambiguity in pronouns - the first "they" would automatically be "brains", and the second would automatically be "neurons"

I feel option E also has same case as in B - the first "that" would automatically be "mice", and the second 'that' automatically be "Canaries"

Please advise where my reasoning going wrong :) :( :(
Expert Post
Retired Moderator
User avatar
G
Joined: 14 Dec 2013
Posts: 3198
Location: Germany
Schools: HHL Leipzig
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)
GMAT ToolKit User Premium Member Reviews Badge
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 21 Apr 2016, 10:21
smartguy595 wrote:
coffeeloverfreak wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that


IMO -That refers to things

in option E 'that' refers to mice & canaries

So can 'that' refers to living creatures and things except People?

Also in option B we have ambiguity in pronouns - the first "they" would automatically be "brains", and the second would automatically be "neurons"

I feel option E also has same case as in B - the first "that" would automatically be "mice", and the second 'that' automatically be "Canaries"

Please advise where my reasoning going wrong :) :( :(


Yes, that can definitely refer to living creatures / beings other than human beings.

Option B is wrong for another major meaning error:
The examples of Neurogenesis include "brain growth", not "mice" or "canaries".
Intern
Intern
avatar
Joined: 20 Apr 2016
Posts: 6
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 16 Jul 2016, 16:53
coffeeloverfreak wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that


"when" is replace time not replace place. so we can eliminate A,B,C and D
Expert Post
Retired Moderator
User avatar
G
Joined: 14 Dec 2013
Posts: 3198
Location: Germany
Schools: HHL Leipzig
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)
GMAT ToolKit User Premium Member Reviews Badge
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 18 Jul 2016, 13:30
hansradja wrote:
coffeeloverfreak wrote:
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that


"when" is replace time not replace place. so we can eliminate A,B,C and D


Here "when" is not replacing place, but correctly replacing time - the time when mice are placed in stimulating environment. So use of "when" does not determine whether a choice is wrong.
Senior Manager
Senior Manager
User avatar
S
Joined: 04 Oct 2015
Posts: 345
Location: Viet Nam
Concentration: Finance, Economics
GMAT 1: 730 Q51 V36
GPA: 3.56
Premium Member Reviews Badge
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post Updated on: 20 Jun 2017, 19:50
Recently documented, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
_________________

Do not pray for an easy life, pray for the strength to endure a difficult one - Bruce Lee


Originally posted by leanhdung on 20 Jun 2017, 01:15.
Last edited by leanhdung on 20 Jun 2017, 19:50, edited 2 times in total.
Expert Post
Top Contributor
1 KUDOS received
Retired Moderator
User avatar
P
Status: worked for Kaplan's associates, but now on my own, free and flying
Joined: 19 Feb 2007
Posts: 4450
Location: India
WE: Education (Education)
Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

Show Tags

New post 20 Jun 2017, 08:00
1
1
Top Contributor
Recently documented examples of neurogenesis, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that

The pronoun 'they is indeed a serious problem and one of the most eligible points for an easy POE. 'They' might refer to the examples, which is the subject of the whole sentence or the plural mice, or the brain cells etc in the first part. The same 'they' strangely may refer to the canaries or the neurons in the second part.

With so much muddle, it will be best to avoid any choice containing 'they' such as B, C, and D on the D-day. Now it will be easy to discard A since the choice talks of the brain rather than the brain's growth. This leaves us with the freedom to choose E.

But the jarring note is that the choice refers to examples. but still, uses the conjunction 'or' rather than 'and'.
_________________

you can know a lot about something and not really understand it."-- a quote
No one knows this better than a GMAT student does.
Narendran +9198845 44509

Re: Recently documented examples of neurogenesis, the production of new br   [#permalink] 20 Jun 2017, 08:00

Go to page    1   2    Next  [ 24 posts ] 

Display posts from previous: Sort by

Recently documented examples of neurogenesis, the production of new br

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

Events & Promotions

PREV
NEXT


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®.