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Recently documented examples of neurogenesis, the production of new br

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Manager
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Joined: 04 Jun 2015
Posts: 86

Kudos [?]: 54 [0], given: 2

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

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New post 01 Aug 2017, 10:10
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



In A – neurogene, the production of new brain cells, include the brain growing [X] in mice – the underlined portion is complex gerund if you like jargon [is noun inside and noun outside] is made parallel to, indicated by the parallelism marker OR, neurons increasing [Y] [this is neither an action noun nor a complex gerund]. Simply X and Y are not parallel.
To understand look at this example -
WRONG - I enjoyed drinking the water [this is verb- ing form] AND the wine tasting [this is complex gerund btw]
RIGHT - I enjoyed drinking the water AND tasting the wine

B – Runner up choice. …mice whose brain grow…..or canaries whose neurons increase… clearly parallel, however, the non- underlined part neurogene is the production of new brain cells and that CANNOT include mice or canaries.

C – See the last part of the sentence ….or C’s neurons that increase when THEY learn new songs – neurons cannot logically learn new songs [IMP - we are not referring to canaries here but canaries' neurons]

D –Same as C
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Re: Recently documented examples of neurogenesis, the production of new br [#permalink]

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New post 09 Aug 2017, 17:31
selene wrote:
huh? E?

"..brain grown.." does not ever sound correct to me???

B seems to be the most parallel

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

:roll:


B is parallel fine but that isn't the only criteria. Read the full sentence. Recently documented examples of neurogenesis include mice.

That makes no sense when you remove the appositive modifier. Neurogensis is clearly some sort of disease so the examples will list examples of what happens from this disease.

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

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New post 09 Aug 2017, 20:25
I think there are 2 issues that gmat wanted to test you on in this questions

1. pronoun
2. modifier

(in my point, the test maker try to tricks you to think that they are trying to test you on parallelism concepts) this is how my analysis goes:

meaning: recently documented examples of neurogenesis,......., include x or y

Think about this: what noun can be the documented examples (evidence)

A. the brain (growing)..... or neurons (increasing)........ (please notice that growing and increasing are the modifiers of both nouns) ----> (keep this in mind - I am not so comfortable to cross this out)

B. mice (whose) ...... or canaries (whose)

C. / D. have "they" pronoun that intended to refer to canaries. But there is no Canaries (CANARIES' and canaries is diff) ----> cross out

E. brain growth (in mice) ...... or an increase (in neurons) in canaries ---> make the most sense that it can be the documented examples

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

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New post 10 Aug 2017, 20:05
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Please comment on explanation:
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
Error:
When - used to modify time in noun form

B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
Meaning error:
Neurogenesis - the production of brain cells CANNOT be mice and canaries

Pronoun error
When - modify time in noun form

Pronoun:
They refer to canaries / mice

C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
Meaning error:
Neurogenesis - the production of brain cells CANNOT be brain

Pronoun:
They refer to neurons / brains

Pronoun error
When - modify time in noun form

D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
Pronoun error
When - modify time in noun form
They refer to neurons

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

Kudos [?]: 6 [0], given: 5

Re: Recently documented examples of neurogenesis, the production of new br   [#permalink] 10 Aug 2017, 20:05

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Recently documented examples of neurogenesis, the production of new br

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