Scientists have recently discovered that the ultrathin, : GMAT Sentence Correction (SC)
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# Scientists have recently discovered that the ultrathin,

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Scientists have recently discovered that the ultrathin, [#permalink]

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21 Nov 2010, 03:11
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Scientists have recently discovered that the ultrathin, layered construction of a butterfly’s
wings, the same as the one making some butterflies shimmer via the phenomenon of
iridescence, are enabling
the insect to control how much heat energy is absorbed by its
wings and how much is reflected away.
A. wings, the same as the one making some butterflies shimmer via the phenomenon
of iridescence, are enabling

B. wings, which is the same one that makes some butterflies shimmer via the
phenomenon of iridescence, that also enables
C. wings is the same as the one that makes some butterflies shimmer via the
phenomenon of iridescence, enabling
D. wings—the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enables
E. wings—of the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enable
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Re: Scientists have recently discovered [#permalink]

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22 Nov 2010, 17:26
1
KUDOS
raghavs wrote:
Scientists have recently discovered that the ultrathin, layered construction of a butterfly’s
wings, the same as the one making some butterflies shimmer via the phenomenon of
iridescence, are enabling
the insect to control how much heat energy is absorbed by its
wings and how much is reflected away.

A. wings, the same as the one making some butterflies shimmer via the phenomenon
of iridescence, are enabling
B. wings, which is the same one that makes some butterflies shimmer via the
phenomenon of iridescence, that also enables
C. wings is the same as the one that makes some butterflies shimmer via the
phenomenon of iridescence, enabling
D. wings—the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enables
E. wings—of the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enable

Hi!

I'm not sure if you have a specific question or are just wondering about the sentence in general, but we'll look at the whole thing.

A commonly tested grammar topic on the GMAT is modification. Here's the general rule:

Quote:
When a sentence includes a modifying word or phrase, that word or phrase must be placed as closely as possible to whatever it's modifying.

This particular sentence is all about modification - and we recognize that by the parenthetical comment in the middle:

Quote:
, the same as the one making some butterflies shimmer via the phenomenon of iridescence,

(I included the commas because those are our signals that we're almost certainly being tested on modification).

So, whatever that phrase is modifying should be directly before or after the phrase.

In the original sentence, the subject of the modifying phrase isn't as clear as the GMAT demands; it could be the wings or the layered construction of the wings. When there's any kind of modification ambiguity, it's extremely unlikely that the choice will be correct.

Looking at the remaining choices:

B) has the same issue as (A) (adding "which is" doesn't make it any clearer) - eliminate.

C) has the same issue as (A) - eliminate.

D) begins with 'the same construction as' - this fixes the ambiguity issue as we now know that we're talking about the layered construction - looks good!

E) "of the same construction" doesn't make sense when read into the sentence - "of" messes up the meaning and flow - eliminate.

Choose (D)!
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Re: Scientists have recently discovered [#permalink]

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23 Nov 2010, 15:32
1
KUDOS
I picked "D" as the best choice out of all; however, I think that "also" is not needed before "enables" (because only one function of wing structure is mentioned).
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Re: Scientists have recently discovered [#permalink]

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20 Dec 2010, 19:59
Fijisurf wrote:
I picked "D" as the best choice out of all; however, I think that "also" is not needed before "enables" (because only one function of wing structure is mentioned).

same here
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Re: Scientists have recently discovered that the ultrathin, [#permalink]

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18 May 2015, 06:51
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Scientists have recently discovered that the ultrathin, [#permalink]

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08 Jun 2016, 05:28
raghavs wrote:
Scientists have recently discovered that the ultrathin, layered construction of a butterfly’s
wings, the same as the one making some butterflies shimmer via the phenomenon of
iridescence, are enabling
the insect to control how much heat energy is absorbed by its
wings and how much is reflected away.
A. wings, the same as the one making some butterflies shimmer via the phenomenon
of iridescence, are enabling.

B. wings, which is the same one that makes some butterflies shimmer via the
phenomenon of iridescence, that also enables
C. wings is the same as the one that makes some butterflies shimmer via the
phenomenon of iridescence, enabling
D. wings—the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enables
E. wings—of the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enable

A. wings, the same as the one making some butterflies shimmer via the phenomenon
of iridescence, are enabling. plural verb is not required for singular 'layered construction'

B. wings, which is the same one that makes some butterflies shimmer via the
phenomenon of iridescence, that also enables 'which' incorrectly refers to 'wings'
C. wings is the same as the one that makes some butterflies shimmer via the
phenomenon of iridescence, enabling replacing 'one' with 'construction' changes the meaning, stating two constructions to be different. However, intended meaning is that only one construction leads to control the energy and shimmer.
D. wings—the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enables 'enables' is the right verb used for singular 'construction
E. wings—of the same construction that makes some butterflies shimmer via the
phenomenon of iridescence—also enable 'enable' is not right.
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Re: Scientists have recently discovered that the ultrathin, [#permalink]

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26 Dec 2016, 12:02
Fijisurf wrote:
I picked "D" as the best choice out of all; however, I think that "also" is not needed before "enables" (because only one function of wing structure is mentioned).

Agreed. I was unsure of my answer because of the inclusion of "also."
Re: Scientists have recently discovered that the ultrathin,   [#permalink] 26 Dec 2016, 12:02
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