It is currently 22 Nov 2017, 02:58

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Birds have been said to be descended from certain birdlike dinosaur sp

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

4 KUDOS received
Director
Director
User avatar
B
Status: I don't stop when I'm Tired,I stop when I'm done
Joined: 11 May 2014
Posts: 564

Kudos [?]: 2930 [4], given: 220

Location: Bangladesh
Concentration: Finance, Leadership
GPA: 2.81
WE: Business Development (Real Estate)
Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 15 Jun 2016, 12:57
4
This post received
KUDOS
19
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

75% (01:24) correct 25% (01:27) wrong based on 1440 sessions

HideShow timer Statistics

Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Which of the following is an assumption on which the argument relies?

A) The birdlike dinosaurs have no descendants.
B) There are no flightless dinosaur species that have the distinctive structural features shred by birds and birdlike dinosaurs.
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have nit yet been unearthed.
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another.
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.

OG 2017 New Question
[Reveal] Spoiler: OA

_________________

Md. Abdur Rakib

Please Press +1 Kudos,If it helps
Sentence Correction-Collection of Ron Purewal's "elliptical construction/analogies" for SC Challenges

Kudos [?]: 2930 [4], given: 220

Intern
Intern
avatar
Joined: 03 Jul 2014
Posts: 2

Kudos [?]: [0], given: 1

Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 16 Jun 2016, 04:08
C most logically fits the bill...

Sent from my SM-G925I using GMAT Club Forum mobile app

Kudos [?]: [0], given: 1

1 KUDOS received
Verbal Forum Moderator
User avatar
D
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 1605

Kudos [?]: 1008 [1], given: 81

Location: India
Concentration: General Management, Strategy
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 18 Jun 2016, 02:21
1
This post received
KUDOS
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Pre- thinking - Because birdlike dinosaur fossils that are older that the bird fossils have not been found , it does not mean such birdlike dinosaur did not exist before birds .

Which of the following is an assumption on which the argument relies?

A) The birdlike dinosaurs have no descendants. Out of scope
B) There are no flightless dinosaur species that have the distinctive structural features shred by birds and birdlike dinosaurs. Out of scope
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have not yet been unearthed. Correct - if we negate this statement , then the argument falls apart .
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another. Incorrect
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features. Incorrect

Answer C
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Kudos [?]: 1008 [1], given: 81

Intern
Intern
avatar
Joined: 05 Nov 2014
Posts: 15

Kudos [?]: [0], given: 39

Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 24 Jun 2016, 06:46
Using Negation
C) There are birdlike dinosaur fossils that are older that the bird fossils but have not yet been unearthed -- The argument will fall apart

So the correct answer is C

Kudos [?]: [0], given: 39

Manager
Manager
User avatar
B
Joined: 24 Jun 2016
Posts: 247

Kudos [?]: 43 [0], given: 13

Location: Viet Nam
Schools: Booth '19
GMAT 1: 770 Q60 V60
GPA: 4
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 26 Jun 2016, 07:04
The issue with the reasoning is the assumption that there are no birdlike dinosaurs fossils that have not been found.

Answer choice C.
_________________

Offering top quality online and offline GMAT tutoring service in Vietnam, Southeast Asia, and worldwide.

$60/hour as of November 2017.


http://www.facebook.com/HanoiGMATtutor
HanoiGMATTutor@gmail.com

Kudos [?]: 43 [0], given: 13

3 KUDOS received
Manager
Manager
User avatar
B
Joined: 28 Sep 2013
Posts: 92

Kudos [?]: 20 [3], given: 81

GMAT 1: 740 Q51 V39
Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 14 Aug 2016, 16:06
3
This post received
KUDOS
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Which of the following is an assumption on which the argument relies?

PRETHINKING: DINOSAUR CAME LATER TO THOSE BIRDS WHOSE FOSSILS ARE DATED OLDER THAN THE DINOSAUR FOSSILS.

A) The birdlike dinosaurs have no descendants.
B) There are no flightless dinosaur species that have the distinctive structural features shared by birds and birdlike dinosaurs.
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have not yet been unearthed.
This is one of the versions of our PRETHINKING.
D) It could not have been the case that some birds were descendant from one of the bird-like dinosaur species and other birds from another.
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.
_________________

Richa Champion | My GMAT Journey - 470 720 740

Target 760+

Not Improving after Multiple attempts. I can guide You.
Contact me richacrunch2@gmail.com

Kudos [?]: 20 [3], given: 81

Intern
Intern
avatar
B
Joined: 05 Jan 2016
Posts: 21

Kudos [?]: 1 [0], given: 56

Location: India
Concentration: Finance, Strategy
WE: Information Technology (Computer Software)
GMAT ToolKit User
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 04 Oct 2016, 02:42
Answer Choice C

It clearly states that there are no birdlike dinosaur fossils that are older that the bird fossils because which conclusion will hold true.

Kudos [?]: 1 [0], given: 56

Intern
Intern
User avatar
Joined: 13 Feb 2016
Posts: 18

Kudos [?]: 7 [0], given: 129

Location: India
Akhilesh: Das
Concentration: Strategy, Technology
GMAT 1: 540 Q39 V24
GMAT ToolKit User Reviews Badge CAT Tests
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 15 Oct 2016, 08:54
Was able to narrow it down to C and E. Then used negation test to zero in on C. The negation test breaks down the argument completely.
_________________

Thanks & Regards,
Akhilesh

Kudos [?]: 7 [0], given: 129

Intern
Intern
User avatar
B
Joined: 26 Jun 2016
Posts: 21

Kudos [?]: 5 [0], given: 262

Location: Viet Nam
Concentration: Finance, Entrepreneurship
Schools: Insead Sept'18
GMAT 1: 580 Q48 V23
GPA: 3.25
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 23 Jan 2017, 03:09
Please help me explain why D is not the answer.
My reasoning:
Conclusion: Birds cannot be descendant of certain birdlike dinosaur species with which they share distinctive structural features
Trying to negate the D:
It could have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another --> ruining the conclusion

Kudos [?]: 5 [0], given: 262

Intern
Intern
avatar
B
Joined: 13 Mar 2016
Posts: 20

Kudos [?]: 12 [0], given: 25

Location: India
Concentration: General Management, Entrepreneurship
WE: General Management (Energy and Utilities)
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 23 Jan 2017, 07:12
It is the assumed that there are no birdlike dinosaurs fossils that have not been found yet.

Therefore C is correct.

Kudos [?]: 12 [0], given: 25

Intern
Intern
avatar
B
Joined: 30 May 2016
Posts: 21

Kudos [?]: [0], given: 26

Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 25 Jan 2017, 14:11
C is the answer. If it is not true, there is a possibility that undermine the argument.

Kudos [?]: [0], given: 26

Senior Manager
Senior Manager
User avatar
G
Joined: 04 Sep 2015
Posts: 479

Kudos [?]: 80 [0], given: 18

Location: India
WE: Information Technology (Computer Software)
Birds have been said to be descended [#permalink]

Show Tags

New post 27 Feb 2017, 14:41
4
This post was
BOOKMARKED
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Which of the following is an assumption on which the argument relies?

A) The birdlike dinosaurs have no descendants.
B) There are no flightless dinosaur species that have the distinctive structural features shred by birds and birdlike dinosaurs.
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have nit yet been unearthed.
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another.
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.

Kudos [?]: 80 [0], given: 18

Top Contributor
2 KUDOS received
Director
Director
User avatar
S
Affiliations: CrackVerbal
Joined: 03 Oct 2013
Posts: 512

Kudos [?]: 595 [2], given: 6

Location: India
GMAT 1: 780 Q51 V46
Re: Birds have been said to be descended [#permalink]

Show Tags

New post 27 Feb 2017, 18:33
2
This post received
KUDOS
Top Contributor
1
This post was
BOOKMARKED
Simplify the argument -

Bird fossils much older than birdlike dinosaur fossils have been found --> Birds did not descend from certain birdlike dinosaur fossils

Let us look at the answer options -

Option A - Incorrect.
Try to negate this. Even if there were descendants of birdlike dinosaurs, the argument still holds because bird fossils much older than them have been found.

Option B - Incorrect.
We are interested only in birds and birdlike dinosaurs and their fossils. Talking about flightless dinosaurs is not relevant to the argument.

Option C - Correct.
Negate this.
If there are indeed such fossils (but have not yet been unearthed), the conclusion "Birds did not descend from certain birdlike dinosaur fossils" will be significantly weakened.
Hence, the correct answer.

Option D - Incorrect.
Even if that were the case, the argument is not weakened because bird fossils that are much older than those of birdlike dinosaurs have been found.

Option E - Incorrect.
Negate this one.
"Birds could have descended from dinosaur species with which the birds do not share the distinctive structural features." - But we do not know whether these other dinosaur species lived before or after birdlike dinosaurs.
If they did not live before, the argument is not weakened. Hence, incorrect.
_________________

Enroll for our GMAT Trial Course here -
http://gmatonline.crackverbal.com/

Learn all PS and DS strategies here-
http://gmatonline.crackverbal.com/p/mastering-quant-on-gmat

For more info on GMAT and MBA, follow us on @AskCrackVerbal

Kudos [?]: 595 [2], given: 6

Manager
Manager
avatar
P
Joined: 06 Jan 2015
Posts: 236

Kudos [?]: 111 [0], given: 469

Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Re: Birds have been said to be descended [#permalink]

Show Tags

New post 27 Feb 2017, 18:44
abhishekdadarwal2009 wrote:
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Which of the following is an assumption on which the argument relies?

A) The birdlike dinosaurs have no descendants.
B) There are no flightless dinosaur species that have the distinctive structural features shred by birds and birdlike dinosaurs.
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have nit yet been unearthed.
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another.
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.


Hi abhishekdadarwal2009,

For more detailed discussion please refer https://gmatclub.com/forum/birds-have-been-said-to-be-descended-from-certain-birdlike-dinosaur-sp-220394.html

http://www.beatthegmat.com/og-cr-birds-have-been-said-to-be-descended-t292532.html

souvik101990 Merge the topic
_________________

आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution

Kudos [?]: 111 [0], given: 469

Manager
Manager
avatar
S
Joined: 29 May 2016
Posts: 131

Kudos [?]: 17 [0], given: 348

CAT Tests
Re: Birds have been said to be descended [#permalink]

Show Tags

New post 28 Feb 2017, 11:35
p1 : Birds descended bird like dinosaur species with which they share distinctive structural features

conclusion this cannot be true why because bird fossils much older

what if dinosaur fossils found are older than bird fossils. Conclulsion be false
hence assumption be :- dinosaur fossils found are not older than bird fossils
C is the answer

Kudos [?]: 17 [0], given: 348

2 KUDOS received
Senior SC Moderator
User avatar
D
Joined: 14 Nov 2016
Posts: 1242

Kudos [?]: 1297 [2], given: 434

Location: Malaysia
GMAT ToolKit User Premium Member CAT Tests
Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 11 Apr 2017, 20:34
2
This post received
KUDOS
AbdurRakib wrote:
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Which of the following is an assumption on which the argument relies?

A) The birdlike dinosaurs have no descendants.
B) There are no flightless dinosaur species that have the distinctive structural features shred by birds and birdlike dinosaurs.
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have nit yet been unearthed.
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another.
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.

OG 2017 (Book Question 607)


nit (noun) = the egg of a louse, which sticks to the fur of an animal or the hair of a person

Birds and Dinosaurs

Step 1: Identify the Question

The word assumption in the question stem indicates that this is a Find the Assumption question.

Step 2: Deconstruct the Argument

Birds desc from B-like dinos?
C: Fossil = NO b/c B fossils older than B-like dino fossils

The author concludes that a certain theory CANNOT be true. As evidence, the author states that there are bird fossils even older than the oldest birdlike dinosaur fossils found. So birds must be descended from something other than birdlike dinosaurs?

NOT necessarily. The author is assuming that the fact that older birdlike dinosaur fossils haven’t been found means that these fossils don’t exist. It’s possible that there were older birdlike dinosaurs but either their fossils haven’t been found yet or their bones didn’t survive as fossils for some reason.

Step 3: Pause and State the Goal

On Assumption questions, the goal is to find something that the author must believe TO BE TRUE in order to draw the conclusion.

Step 4: Work from Wrong to Right

(A) The author’s argument does not assume anything about modern-day descendants of the birdlike dinosaurs.
(B) The argument is confined to the possible connection between birds and birdlike dinosaurs. Flightless dinosaurs, another category, are not at issue in the argument.
(C) CORRECT. The author does assume that there aren’t older fossils of the birdlike dinosaurs that just haven’t been found yet. Try the Negation Test: if there are birdlike dinosaur fossils that just HAVEN'T been found yet, then the author’s argument is ruined.
(D) The author’s argument does not assume that all birds descended from the same birdlike dinosaur species. The author’s argument is open to the idea that there could have been multiple birdlike dinosaur species from which modern-day birds evolved.
(E) The argument is confined to rebutting the idea that birds descended from certain birdlike dinosaur species. It does not address whether the birds could have been descended from other dinosaur species with different structural features.
_________________

"Be challenged at EVERY MOMENT."

“Strength doesn’t come from what you can do. It comes from overcoming the things you once thought you couldn’t.”

"Each stage of the journey is crucial to attaining new heights of knowledge."

Rules for posting in verbal forum | Please DO NOT post short answer in your post!

Kudos [?]: 1297 [2], given: 434

Intern
Intern
avatar
B
Joined: 20 Sep 2015
Posts: 22

Kudos [?]: 5 [0], given: 46

Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 28 Sep 2017, 04:10
Hientran48 wrote:
Please help me explain why D is not the answer.
My reasoning:
Conclusion: Birds cannot be descendant of certain birdlike dinosaur species with which they share distinctive structural features
Trying to negate the D:
It could have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another --> ruining the conclusion


I negated D and it destroyed the conclusion for me too. Though option C's negation was a stronger destroyer of the argument, I request an expert to clarify why option D is certainly not the right answer.

Kudos [?]: 5 [0], given: 46

Intern
Intern
avatar
B
Joined: 20 Sep 2015
Posts: 22

Kudos [?]: 5 [0], given: 46

Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 28 Sep 2017, 04:11
I negated D and it destroyed the conclusion for me. Though option C's negation was a stronger destroyer of the argument, I request an expert to explain why option D is certainly not the right answer.

Kudos [?]: 5 [0], given: 46

Expert Post
1 KUDOS received
GMAT Club Verbal Expert
User avatar
G
Status: GMAT and GRE tutor
Joined: 13 Aug 2009
Posts: 1180

Kudos [?]: 1888 [1], given: 454

Location: United States
GMAT 1: 780 Q51 V46
GMAT 2: 800 Q51 V51
GRE 1: 340 Q170 V170
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 29 Sep 2017, 15:43
1
This post received
KUDOS
Expert's post
gumnamibaba wrote:
I negated D and it destroyed the conclusion for me. Though option C's negation was a stronger destroyer of the argument, I request an expert to explain why option D is certainly not the right answer.

Quote:
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another.

To negate choice (D) is not to say that some birds definitely were descended from multiple dinosaur species. If we do not make the assumption stated in choice (D), we allow for the possibility that some birds were descended from MULTIPLE dinosaur species rather than a single birdlike dinosaur species.

In order for the author's argument to hold, it is not necessary that we first establish that birds could not have descended from multiple dinosaur species. Here is a breakdown of the argument if we do not make the assumption stated in choice (D):

  • Birds may have descended from one or more species of dinosaurs
  • Whether it was one species or multiple species, if birds were in fact descended from dinosaurs, we would not expect to find birds fossils that are older than dinosaur fossils.
  • Since there are bird fossils that are much older than the earliest birdlike dinosaur fossils that have been found, the fossil record shows that birds could NOT have descended from certain birdlike dinosaur species.

Choice (D) is tricky, but, unlike choice (C), it is not a required assumption.
_________________

GMAT Club Verbal Expert | GMAT/GRE tutor at www.gmatninja.com (Now hiring!) | GMAT blog | Food blog | Friendly warning: I'm bad at PMs

GMAT Ninja Wednesdays LIVE on YouTube
Join us, and ask your questions in advance!

Beginners' guides to GMAT verbal
Reading Comprehension | Critical Reasoning | Sentence Correction

SC & CR Questions of the Day (QOTDs), featuring expert explanations
All QOTDs | Subscribe via email | RSS

Need an expert reply?
Hit the request verbal experts' reply button -- and please be specific about your question. Feel free to tag @GMATNinja and @GMATNinjaTwo in your post.

Sentence Correction articles & resources
How to go from great (760) to incredible (780) on GMAT SC | That "-ing" Word Probably Isn't a Verb | That "-ed" Word Might Not Be a Verb, Either | No-BS Guide to GMAT Idioms | "Being" is not the enemy | WTF is "that" doing in my sentence?

Reading Comprehension, Critical Reasoning, and other articles & resources
All GMAT Ninja articles on GMAT Club | Using LSAT for GMAT CR & RC |7 reasons why your actual GMAT scores don't match your practice test scores | How to get 4 additional "fake" GMAT Prep tests for $29.99... in any section order

YouTube verbal webinars:
"Next-level" GMAT pronouns | Uses of "that" on the GMAT | Parallelism and meaning | Simplifying GMAT verb tenses | Comparisons, part I |
November webinar schedule

Kudos [?]: 1888 [1], given: 454

Manager
Manager
User avatar
S
Joined: 27 Dec 2016
Posts: 177

Kudos [?]: 47 [0], given: 205

Concentration: Social Entrepreneurship, Nonprofit
GPA: 3.65
WE: Sales (Consumer Products)
Premium Member CAT Tests
Re: Birds have been said to be descended from certain birdlike dinosaur sp [#permalink]

Show Tags

New post 18 Oct 2017, 07:47
AbdurRakib wrote:
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils much older than the earliest birdlike dinosaur fossils that have been found.

Which of the following is an assumption on which the argument relies?

A) The birdlike dinosaurs have no descendants.
B) There are no flightless dinosaur species that have the distinctive structural features shred by birds and birdlike dinosaurs.
C) There are no birdlike dinosaur fossils that are older that the bird fossils but have nit yet been unearthed.
D) It could not have been the case that some birds were descendant from one of the bird like dinosaur species and other birds from another.
E) Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.

OG 2017 New Question


Hello, below is my analysis.

- Before, bird is believed come from birdlike dinosaurs, not from bird itself.
- However, this might be wrong, because we found BIRD FOSSIL that is OLDER than BIRDLIKE DINOSAUR FOSSIL.

- So, let's say that the age of BIRD FOSSIL is year 100 and the age of BIRDLIKE DINOSAUR FOSSIL is from year 200.

- Is it enough to conclude that the descendant of the BIRD is not A BIRDLIKE DINOSAUR?
- How if one day we found another BIRDLIKE DINOSAUR FOSSIL from year 50? --> This might be our assumption.

- Clearly C state this assumption. It must be true to the conclusion hold true.
_________________

There's an app for that - Steve Jobs.

Kudos [?]: 47 [0], given: 205

Re: Birds have been said to be descended from certain birdlike dinosaur sp   [#permalink] 18 Oct 2017, 07:47
Display posts from previous: Sort by

Birds have been said to be descended from certain birdlike dinosaur sp

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.