• NEW! FREE Beat The GMAT Quizzes
Hundreds of Questions Highly Detailed Reporting Expert Explanations
• 7 CATs FREE!
If you earn 100 Forum Points

Engage in the Beat The GMAT forums to earn
100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## RC - Two hypothesis - Weaken Question ##### This topic has 1 expert reply and 21 member replies Goto page Junior | Next Rank: 30 Posts Joined 06 Apr 2012 Posted: 14 messages Followed by: 7 members Upvotes: 7 Can someone please give out the OA on this one? I think it should be D. Junior | Next Rank: 30 Posts Joined 04 Jun 2012 Posted: 26 messages Upvotes: 1 imo D some really good explanations! well done guys'1 _________________ Looking forward to 2013 MBA admissions! Newbie | Next Rank: 10 Posts Joined 25 Jul 2012 Posted: 1 messages D for me. Would like to highlight something else too. arboreal-Many small animals, and even some goats and kangaroos, are capable of climbing trees but are not gliders. cursorial- an animal would have to run quite fast to take off. Still, some small terrestrial animals can achieve high speeds. So, the passage itself tells us that comparision with other animals for flying, according to BOTH hypothesis, is not strongly supported. This helped me to eliminate C. Not sure whether this approach is correct. Comments are welcome. Newbie | Next Rank: 10 Posts Joined 12 Sep 2013 Posted: 5 messages OA: D Newbie | Next Rank: 10 Posts Joined 12 Sep 2013 Posted: 5 messages OA: D Newbie | Next Rank: 10 Posts Joined 10 Jul 2013 Posted: 6 messages Upvotes: 2 also, D is clearly a piece of evidence used to undermine the hypothesis - the earliest known bird did not have trees high enough to glide from, so it probably developed flight in a different way. Once you have D, there really is no reason to go and talk yourself into choosing a trap answer choice such as C.[/quote]@ Geva can we really say that 'relatively small' is the same as 'not tall enough'? The passage says 'plants were no taller than a few meters... no where does 'tall figurre in.. The trees could be relatively small, yet be tall enough (or not - we do not know). Are we not making an assumption here? Legendary Member Joined 12 May 2015 Posted: 518 messages Upvotes: 10 Test Date: 3 Oct Target GMAT Score: 750 straight forward D. if plants are so small then jumping from plants or trees will not help in flying. Junior | Next Rank: 30 Posts Joined 27 Aug 2014 Posted: 14 messages tgou008 wrote: Wow this is a really tough choice between C and D, and I really don't think I can call it either way. What is the source for this question and what is the OA? Thanks It's not a tough choice, unless you make it one by second guessing yourself instead of aggressively eliminating. ldoolitt got it right: the fact that small animals can climb does not in and of itself undermine the arboreal hypothesis. For C to be correct, it needs to present the entire undermining fact: that many small animals can climb but cannot fly. also, D is clearly a piece of evidence used to undermine the hypothesis - the earliest known bird did not have trees high enough to glide from, so it probably developed flight in a different way. Once you have D, there really is no reason to go and talk yourself into choosing a trap answer choice such as C.[/quote]Hi For the same passage, I am not clear why the OA for this question is E. The author states that the studies till now have been unconvincing. Pls refer to para 1. However, how can we infer that scientists themselves were uncertain? The passage suggests which of the following regarding the climbing ability of Archaeopteryx? A. Its ability to climb trees was likely hindered by the presence of incipient feathers on its forelimbs. B. It was probably better at climbing trees than were its maniraptoran dinosaur cousins. C. It had certain physical adaptations that suggest it was skilled at climbing trees. D. Scientists have recently discovered fossil evidence suggesting it could not climb trees. E. Scientists are uncertain whether it was capable of climbing trees • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

### Top First Responders*

1 Ian Stewart 41 first replies
2 Brent@GMATPrepNow 36 first replies
3 Scott@TargetTestPrep 33 first replies
4 Jay@ManhattanReview 30 first replies
5 GMATGuruNY 23 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

### Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

159 posts
2 Max@Math Revolution

Math Revolution

91 posts
3 Brent@GMATPrepNow

GMAT Prep Now Teacher

56 posts
4 Ian Stewart

GMATiX Teacher

50 posts
5 GMATGuruNY

The Princeton Review Teacher

35 posts
See More Top Beat The GMAT Experts