Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 1
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 1 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand5 seats leftStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Ultrathin layer

Expert replies
Post new topic Locked
Subscribe topic
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 239
Joined: Thu Oct 28, 2010 8:40 amFollowed by: 2 members
Location: India
Thanked: 5 times
GMAT Score:690
by Dean Jones » Sat Nov 26, 2011 10:50 pm
Dear Friends,

I was having problems in answering the following question.

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


Please help.

OA after some discussions.

Regards
Deano.
Top
Join the discussion
Source: — Sentence Correction |
Legendary Member
Posts: 784
Joined: Sun Apr 03, 2011 3:51 amFollowed by: 12 members
Thanked: 114 times

by patanjali.purpose » Sun Nov 27, 2011 3:19 am
Dean Jones wrote:Dear Friends,

I was having problems in answering the following question.

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


Please help.

OA after some discussions.

Regards
Deano.
Subject of the clause 'the ultrathin, layered construction of a butterfly’s wings' - is CONSTRUCTION.
Drop A/E. Drop B as there is no main verb

C vs D
D - use of ALSO (not required; nor mentioned in original sentence). Moreover, the use of THE SAME CONSTRUCTION is not as precise as C in which ONE is used to refer to CONSTRUCTION.

Moreover, ENABLING in C modifies clearly the clause 'The ultrathin...iridescence' and that means the ultrathin construction is enaling the insect to control X and Y (ie how much heat energy is absorbed by its wings and how much is reflected away)

IMO C
Top
Join the discussion
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Sun Nov 27, 2011 3:41 am
Dean Jones wrote:Dear Friends,

I was having problems in answering the following question.

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


Please help.

OA after some discussions.

Regards
Deano.
In A and E, construction (singular) does not agree with the plural verbs are enabling (in A) and enable (in E). Eliminate A and E.

In B, construction (subject) lacks a verb. The result is a sentence fragment. Eliminate B.

In C, enabling (COMMA + VERBing) should modify the NEAREST preceding clause. But it makes no sense to say the one that makes SOME BUTTERFLIES shimmer...enabling THE INSECT to control: the implication is that THE INSECT refers to SOME BUTTERFLIES. Eliminate C.

The correct answer is D.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion
Legendary Member
Posts: 1574
Joined: Fri Jan 28, 2011 2:52 amFollowed by: 13 members
Thanked: 88 times

by aspirant2011 » Sun Nov 27, 2011 10:04 am
Dean Jones wrote:Dear Friends,

I was having problems in answering the following question.

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


Please help.

OA after some discussions.

Regards
Deano.
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 461
Joined: Tue May 10, 2011 9:09 amFollowed by: 3 members
Location: pune
Thanked: 36 times

by amit2k9 » Sun Nov 27, 2011 8:21 pm
split is are enabling, enable and enables.
A,E POE.
usage of which is not correct in B. POE.
the same as one - does not have a clear referent wings or construction ? POE.

D is correct usage.
For Understanding Sustainability,Green Businesses and Social Entrepreneurship visit -https://aamthoughts.blocked/
(Featured Best Green Site Worldwide-https://bloggers.com/green/popular/page2)
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 239
Joined: Thu Oct 28, 2010 8:40 amFollowed by: 2 members
Location: India
Thanked: 5 times
GMAT Score:690

by Dean Jones » Wed Nov 30, 2011 5:35 am
OA is option D
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 242
Joined: Fri Aug 01, 2008 8:49 am
Location: Delhi
Thanked: 6 times

by ranjeet75 » Wed Nov 30, 2011 7:16 am
Yes D is correct
Top
Join the discussion