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Neuroscientists

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komal Legendary Member
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Neuroscientists

Post Mon Feb 08, 2010 7:39 pm
Neuroscientists, having amassed a wealth of
knowledge over the past twenty years about the brain
and its development from birth to adulthood, are
now
drawing solid conclusions about how the human brain
grows and how babies acquire language.

(A) Neuroscientists, having amassed a wealth of
knowledge over the past twenty years about
the brain and its development from birth to
adulthood, are

(8) Neuroscientists, having amassed a wealth of
knowledge about the brain and its development
from birth to adulthood over the past twenty
years, and are

(C) Neuroscientists amassing a wealth of knowledge
about the brain and its development from birth
to adulthood over the past twenty years, and are

(D) Neuroscientists have amassed a wealth of
knowledge over the past twenty years about the
brain and its development from birth to adulthood,

(E) Neuroscientists have amassed, over the past
twenty years, a wealth of knowledge about the
brain and its development from birth to
adulthood,

OA A

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mgmt_gmat Master | Next Rank: 500 Posts Default Avatar
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Post Thu Feb 11, 2010 4:27 am
IMO (A)..

having shold be used here.. drawing conclusion because of past work

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komal Legendary Member
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Post Tue Feb 09, 2010 9:48 pm
money9111 wrote:
IMO (A) because a lot of the choices just seemed redundant when read with the original sentence. Komal do you have an idea about what level this would be?

600+ level question i would guess

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mgmt_gmat Master | Next Rank: 500 Posts Default Avatar
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Post Thu Feb 11, 2010 4:27 am
IMO (A)..

having shold be used here.. drawing conclusion because of past work

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komal Legendary Member
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Post Tue Feb 09, 2010 9:48 pm
money9111 wrote:
IMO (A) because a lot of the choices just seemed redundant when read with the original sentence. Komal do you have an idea about what level this would be?

600+ level question i would guess

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Post Thu Sep 30, 2010 3:11 am
Optimus Prime wrote:
Ron, could you please explain what is wrong with D & E
the big issue with those two choices is the same: the misuse of the COMMA -ING modifier.

here's a brief rundown of the use of that modifier:
http://www.beatthegmat.com/which-usage-t42599-15.html#183920

the use of the modifier in this particular sentence does not conform to the rules laid out for COMMA -ING in that post -- i.e., the -ING action in these two choices is not simultaneous with, and is not a direct and inevitable consequence of, the action in the main clause. therefore, it's inappropriate to use this type of modifier.

as for the words of the poster above me, i'm actually not sure whether it's possible to stick "now" between the comma and the -ing form in one of these modifiers. i know that it's not flat-out wrong to do this with adverbs in general -- for instance, it's easily possible to insert the word “thus” between the comma and the -ing form -- but, given the rather severe meaning-based restrictions above, i'm just not sure that it's possible to create a sentence in which that meaning would allow for the use of the word "now".
i.e., when you use the word “now”, there is usually some sort of transition or difference indicated between the past and the present. in a sentence that is meant to highlight that sort of difference, it's extremely unlikely that you're going to be able to convey an action that is simultaneous with, or is a direct and inevitable result of, the first action -- that would seem to be self-contradictory. therefore, i think it's unlikely that you're going to see "comma + now + VERBing" a as a legitimate modifier.

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Post Wed Sep 22, 2010 7:35 am
Optimus Prime wrote:
Ron, could you please explain what is wrong with D & E
It is not Ron here but let me tell you what I think Smile

Choice D -
Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, now drawing solid conclusions about how the human brain grows and how babies acquire language. .

1) The part in red is an independent clause. To make the blue part grammatical, you need a subject (they), a conjunction (and) and a linking verb (are) with main verb (drawing). (and they are now drawing...)

2) Even then, there would be a slight shift in the meaning of the sentence. The main idea to be conveyed is that Neuroscientists are now drawing solid conclusions about the human brain through the knowledge gained over the past 20 years. D, through its construction, places emphasis on amassing of knowledge by neuroscientists .

Choice E -
Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood, now drawing solid conclusions about how the human brain grows and how babies acquire language.

Same two errors as in E.

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Optimus Prime Senior | Next Rank: 100 Posts Default Avatar
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Post Wed Sep 22, 2010 6:47 am
Ron, could you please explain what is wrong with D & E

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Ritwik Junior | Next Rank: 30 Posts Default Avatar
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Post Fri Jul 23, 2010 1:28 am
Why D is wrong ? It has comma verbing construction.

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Post Tue Feb 09, 2010 8:36 am
thephoenix wrote:
komal wrote:
Neuroscientists, having amassed a wealth of
knowledge over the past twenty years about the brain
and its development from birth to adulthood, are
now
drawing solid conclusions about how the human brain
grows and how babies acquire language.

(A) Neuroscientists, having amassed a wealth of
knowledge over the past twenty years about
the brain and its development from birth to
adulthood, are

(8) Neuroscientists, having amassed a wealth of
knowledge about the brain and its development
from birth to adulthood over the past twenty
years, and are

(C) Neuroscientists amassing a wealth of knowledge
about the brain and its development from birth
to adulthood over the past twenty years, and are

(D) Neuroscientists have amassed a wealth of
knowledge over the past twenty years about the
brain and its development from birth to adulthood,

(E) Neuroscientists have amassed, over the past
twenty years, a wealth of knowledge about the
brain and its development from birth to
adulthood,

OA A
amng the given choices A is the best

(B) Neuroscientists, having amassed a wealth of
knowledge about the brain and its development
from birth to adulthood over the past twenty
years
, and are...hiding the non essential part the s/c reads as Neuroscientists, and are--->and is not reqd

(C) Neuroscientists amassing a wealth of knowledge
about the brain and its development from birth
to adulthood over the past twenty years, and are------> amsing is a pariciple phrase and the other verb are is simple present tense and hence not llell

(D) Neuroscientists have amassed a wealth of
knowledge over the past twenty years about the
brain and its development from birth to adulthood,----------> no verb

(E) Neuroscientists have amassed, over the past
twenty years, a wealth of knowledge about the
brain and its development from birth to
adulthood,--------->changes the inteded meaning
Ahh, that's what the much need explanation. Good work brother!

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hrishi19884 Master | Next Rank: 500 Posts
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Post Tue Feb 09, 2010 8:35 am
gmatmachoman wrote:
money9111 wrote:
IMO (A) because a lot of the choices just seemed redundant when read with the original sentence. Komal do you have an idea about what level this would be?
If we rate SC from a rating of 1-5, i feel it stands at 1.5 and not more than that!!
I agree to that as well.

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akahuja143 Master | Next Rank: 500 Posts Default Avatar
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Post Tue Feb 09, 2010 8:12 am
Haiving...is modifier modifying neuroscientis, weneed averb after the subject neuroscients A is only choice that has are..

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Post Tue Feb 09, 2010 7:43 am
The only reason that made me opt for A which dint take more than 15 seconds was coz of Neuroscientists ,..., are

I dont think there is anything else really required to be checked in this sentence.

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Post Tue Feb 09, 2010 2:54 am
money9111 wrote:
IMO (A) because a lot of the choices just seemed redundant when read with the original sentence. Komal do you have an idea about what level this would be?
If we rate SC from a rating of 1-5, i feel it stands at 1.5 and not more than that!!

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Post Tue Feb 09, 2010 1:34 am
'having' is used to when we deal with two activities -

having + past participle shows that once activity has already occured (its in the past) and the second activity depends on the completion of the earlier action.

This use is correct in Option A

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