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# Recently documented examples of neurogenesis, the production of new br

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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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03 Dec 2013, 11:05
1
KUDOS
mohnish104 wrote:
I was confused between A and E. I guess I should keep reminding myself that GMAT doesn't prefer gerund while other viable options are available.

Hey, I'm not very good with the technical nuances, but the reasoning I used to select E over A is as follows:

1. In A, "the brain growing in mice when placed in stimulating environment" could mean either that the brain is placed in a stimulating environment or that the mice is placed in a stimulating environment. Its not clear which one it is. In the second part of A, atleast its clear that the canaries are learning the new songs.
On the other hand in E, its very clear that the mice (canaries) are put in a stimulating environment (learn new songs).

2. Neurogenesis has been defined as the production of new brain cells in the sentence. Therefore, its examples can't be body parts like brain and neurons. Examples have to be nouns that are parallel to the definition as "brain growth" and "increase in neurons" correctly are.

Hope this helps.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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28 Sep 2014, 21:54
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 - Not clear that what is placed in stimulating environment- mice or brain. Parallelism issue.

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they - 2nd They is ambiguous

C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they - Both They are ambiguous. 1st They refers to Brain instead of mice and 2nd They refers to neurons instead of canaries

D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they - They refer to neuron instead of canaries

E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that - Parallel as well as unambiguous -Correct choice
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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24 Nov 2014, 10:41
Include + noun = correct. A out

In B and C ‘they’ is wrong because same pronoun in a sentence can’t refer two different nouns. B and C out

“the brain growth in mice” is not parallel to “canaries' neurons” D out

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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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24 Nov 2014, 12:04
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.

Meaning Error : As per the original sentence the examples include brain and neurons but the meaning should be the growth of brain and increase of neurons
Grammatical Error:
1. brain growing in mice when placed in a stimulating environment
verb+ing modifier growing modifying the brain and it is correct . But the modifier "when placed in a stimulating environment" in correctly modify the brain rather the growth of the brain.
2. neurons increasing in canaries as per the meaning it should be the increase of neurons

A. As mentioned above
B. "they" is ambigous (mice/brains) same with they on the 2nd part
C. canaries' can not be the reference of "they" and as mentioned on B "they" is ambiguous.
D.canaries' can not be the reference of "they"
E. Correct

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
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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11 Jan 2016, 16:51
coffeeloverfreak wrote:
trulyblessed wrote:
(4) include should be followed by X and Y, not X or Y.

I think that's what's tripping me up. I agree with you; I'm looking for an X and Y structure with the word "include". But both (4) and (5) use X or Y.

I picked (E) based on parallelism. But can someone explain why the sentence make sense when it goes like "Examples include A OR B"? Shouldn't OR be replaced by AND? "Examples include A and B" makes more sense right?

Thanks!
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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13 Apr 2016, 19:57
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

A - Two clauses are parallel only when their first word is the same. When and that ... clause are not parallel. See that E solves this issue.
B - they can refer to brains or mice -- pronoun error
C - neurons do not learn new songs - canaries do. While canaries is in possessive form it cannot be modified.
D - Not parallel
E - correct
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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19 Apr 2016, 22:13
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"

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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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21 Apr 2016, 09:21
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"

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".
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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22 Apr 2016, 22:42
sayantanc2k wrote:
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"

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".

Is my reasoning correct for option B?

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

Here first 'they' refers to mice or brains?

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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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27 Apr 2016, 04:40
They is NOT ambiguous at all - and remember that certain levels of pronoun ambiguity is allowed on the GMAT.

However, the problem with option B is that the word "include" must introduce examples, and mice (or canaries) are not examples of brain development.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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16 Jul 2016, 15:53
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
growing/increasing is incorrect

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
makes it seem as if mice/canaries are the examples

C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
they cannot refer to possessive, so they cannot refer to mice nor they cannot refer to canaries

D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
they cannot refer to possessive, so they cannot refer to canaries

E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
Correct Answer. "brain growth" and "increase in neurons" are both nouns so parallel.

Meaning:
- There are new examples of neurogenesis (production of new brain cells)
- 1) brain growing in mice when placed in exciting environment
- 2) neurons increasing in canaries that learn new songs
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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18 Jul 2016, 12:30
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.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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11 Oct 2016, 04:16
documented examples should include information about brain growth and information about neurons.

when placed in a stimulating environment. What happens when they are not placed in the same environment? Does that growth shrink back to the same size?

Only E uses correct form.

brain growth in mice that || increase in neurons in canaries that
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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18 Mar 2017, 06:39
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 - INCORRECT OF USAGE OF WHEN. WHEN IS USED TO DECRIBE LOCATIONS ONLY
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they - THEY IS AMBIGUOUS
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they - THEY IS INCORRECT. BRAINS ARE NOT EXPLICITLY KEPT IN SIMULATING ENVIRONMENT. LOGICALLY, MICE WOULD HAVE BEEN KEPT IN SIMULATION ENV. AND WE CAN NOT USE THEY FOR MICE HERE, BECAUSE MICE IS A POSSESSIVE PRONOUN IN THIS OPTION
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they - SAME AS A
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that - CORRECT. PARALLEL. 'THAT' IS CORRECTLY USED TO DESCRIBE 'MICE'.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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09 May 2017, 09:53
ChrisLele 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

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.

Not sure if you're correct with the reasoning for C. The pronoun can't refer to the possessive and therefore "they" must refer to "brains" and "neurons". However, this makes little sense given that it would be difficult to place a brain or neuron in a stimulating environment.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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19 May 2017, 01:06
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

look at choice D.
"when placed " can modify a full clause or a clause with doing or do-ed

when placed at this room, the banana ripe soon. modifying full clause
the perons feeling comfortable when placed in this room will go to the moon. modifying doing-phrase.

we do not either kind of clause in choice D so that "when placed" can refer to . so, D is wrong
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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20 Jun 2017, 00:15
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
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Last edited by leanhdung on 20 Jun 2017, 18:50, edited 2 times in total.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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20 Jun 2017, 07:00
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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'.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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20 Jun 2017, 10:01
ankursethi297 wrote:
What is wrong with D.
I rejected E as it stated "neuron growth in canaries that sing", which seems to alter the meaning.

Hello ankursethi297,

Let's take a look at Choice D: the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they

The pronoun they in this choice grammatically refers to neurons, suggesting that the neurons learn new songs. Logically, they must refer to canaries'. But because canaries' appears in this choice in possessive form, the non-possessive pronoun they cannot refer to the possessive noun canaries' because possessive nouns act as an adjective.

Also, this choice seems to suggest that the brain growth in mice is placed in a stimulating environment. This meaning is certainly illogical.

Hope this helps.
Thanks.
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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02 Jul 2017, 16:42
devinawilliam83 wrote:
Recently documentedc, 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

Why not b?

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

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
Mice or brains? Could be clearer so we'll put "maybe" if there's no better answer.

C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
Neurons don't learn new songs

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

E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
Re: Recently documented examples of neurogenesis, the production of new br   [#permalink] 02 Jul 2017, 16:42

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