BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

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.

★★★★★5.0559 reviews
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

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
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start 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

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

OG12-SC136-Whereas in mammals the tiny

Expert replies
by kvcpk » Mon Jul 12, 2010 5:34 am
Hi All,

Please read this before posting your reply.

Source of this question is OG-12. This question might have been discussed in BTG already. The very reason I am posting again is to approach SC in a structured way. Hence, I request everyone to post their comments in the following manner.

IMO: A/B/C/D/E

Approach/Steps used for choosing the right answer.

For other options, List the errors associated in the following style:
Option: A/B/C/D/E
Subject-Verb Agreement : NA
Parallelism: NA
Pronouns: NA
Modifiers: NA
Verb Tense:NA
Voice and Mood:NA
Comparisons:NA
Idioms:NA
Meaning/Conciseness:NA
Others:NA

This definitely takes a bit more time and effort. But it will help a lot of students to master OG questions/strategies. We need to know the best approach to solve these. It is equally important to know why the wrong answers are wrong. Explanation for each option will detail that out. Plan is to compile all these threads to a single place for future reference. Hope everyone agrees with me!!

Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.
(A) Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes
(B) Whereas the tiny tubes for the conveying of nutrients to bone cells are arrayed in mammals in parallel lines, birds have tubes that
(C) Unlike mammals, where the tiny tubes for conveying nutrients to bone cells are arrayed in parallel lines, birds' tubes
(D) Unlike mammals, in whom the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, the tubes in birds
(E) Unlike the tiny tubes that convey nutrients to bone cells, which in mammals are arrayed in parallel lines, in birds the tubes

OA A

Expecting active participation and do Let me know your thoughts!!
Join the discussion
Source: — Sentence Correction |

by neerajbansal » Mon Jul 12, 2010 6:16 am
Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.
(A) Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes
(B) Whereas the tiny tubes for the conveying of nutrients to bone cells are arrayed in mammals in parallel lines, birds have tubes that
(C) Unlike mammals, where the tiny tubes for conveying nutrients to bone cells are arrayed in parallel lines, birds’ tubes
(D) Unlike mammals, in whom the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, the tubes in birds
(E) Unlike the tiny tubes that convey nutrients to bone cells, which in mammals are arrayed in parallel lines, in birds the tubes


We need to compare birds with mammals... so based on that B and E and D are out.
c is wrong, because where is incorrectly modifying mammals...It should be in mammals. Where is used for place and when is used for time.

A--> cream of the crap..Looks like the best answer......in mammals is || to in birds
Join the discussion

by nibake » Mon Jul 12, 2010 9:56 am
Indeed, every option but A makes a comparison error. C also makes the error you mentioned, Neera.

Did you mean to say "cream of the CRAP" or was that a typo? lol.
Join the discussion

by kvcpk » Mon Jul 12, 2010 10:29 pm
OA is A.

The original sentence looks perfect. It maintains parallelism.

Let us look at the options in Detail:

Option A:
"whereas" indicates a contrast between two events that need to be parallel.
in A, "whereas" is followed by a clause beginning with the prepositional phrase "in mammals".
This indicates that the clause in the scond part also needs to start with a prepositional phrase similar to it.
Here "in birds" completes that requirement.
Correctly compares "tubes in mammals" to "tubes in birds"

Option B:
Violates Parallelism. "tiny tubes" is being compared to "mammmals"

Option C:
Compares "mammals" to "bird's tubes"
This is clearly evident when the relative caluse is removed.
Unlike mammals, where the tiny tubes for conveying nutrients to bone cells are arrayed in parallel lines, birds' tubes .........
Unlike mammals, birds' tubes .........

Option D:
Violates Parallelism.
Compares "mammals" to "tubes in birds". Using same technique as above, we can justify this.
Unlike mammals, in whom the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, the tubes in birds....
Unlike mammals, the tubes in birds....

Option E:
Violates Parallelism.
Makes the sentence Awkward and Wordy.
Unlike the tiny tubes that convey nutrients to bone cells, which in mammals are arrayed in parallel lines, in birds the tubes ....
If we get rid of relative clause,
Unlike the tiny tubes that convey nutrients to bone cells, in birds the tubes ...
Looks awkward.

Hope this helps!!
Join the discussion

by vjcongmt » Thu Oct 04, 2012 6:40 am
(A) Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes
Was wondering where is the main clause here, first one starts with conjunction and the second with a preposition.
Join the discussion

by patanjali.purpose » Thu Oct 04, 2012 11:54 am
vjcongmt wrote:
(A) Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes
Was wondering where is the main clause here, first one starts with conjunction and the second with a preposition.
In birds THE TUBES FORM a random pattern. Here subject is THE TUBES and FORM verb.

Start of a sentence with a preposition does not make or break about an main clause. Presence of a subject and verb makes a clause.

Take another example, "In 2011 vjcongmt topped in college"
Join the discussion

by vjcongmt » Fri Oct 05, 2012 8:21 am
patanjali.purpose wrote:
vjcongmt wrote:
(A) Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes
Was wondering where is the main clause here, first one starts with conjunction and the second with a preposition.
In birds THE TUBES FORM a random pattern. Here subject is THE TUBES and FORM verb.

Start of a sentence with a preposition does not make or break about an main clause. Presence of a subject and verb makes a clause.

Take another example, "In 2011 vjcongmt topped in college"
Thanks Patanjali,

Got it, it makes more sense if we rearrange the sentence a little bit..

"in birds the tubes" to "the tubes in birds"....
Join the discussion

• Page 1 of 1