GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 21 Feb 2019, 20:37

### 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

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

## Events & Promotions

###### Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar

February 21, 2019

February 21, 2019

10:00 PM PST

11:00 PM PST

Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.
• ### Free GMAT RC Webinar

February 23, 2019

February 23, 2019

07:00 AM PST

09:00 AM PST

Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT

# The mastodon, a large mammal resembling today's elephant,

Author Message
TAGS:

### Hide Tags

Director
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 26 Nov 2009
Posts: 734
Location: Singapore
Concentration: General Management, Finance
Schools: Chicago Booth - Class of 2015
The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

Updated on: 10 Mar 2018, 01:58
2
8
00:00

Difficulty:

55% (hard)

Question Stats:

63% (01:51) correct 37% (02:08) wrong based on 346 sessions

### HideShow timer Statistics

The mastodon, a large mammal resembling today's elephant, became extinct at the end of the Ice Age. Scientists once attributed the mastodon's extinction to the disappearance of evergreen forests at the end of the Ice Age. More recently, however, scientists have rejected that theory, hypothesizing instead that the mastodon's extinction was caused by the draining of glacial wetlands.

Which of the following, if recently discovered, would help to account for the change in the accepted explanation of the mastodon's extinction?

(A) When the Ice Age ended, many forests died off, endangering the food supply for herbivores that fed primarily on evergreens.
(B) As glaciers receded at the end of the Ice Age, glacial wetlands drained, leaving a new topography of hills and plains.
(C) Bacteria found in mastodon remains are similar to bacteria found in the remains of species that are known to have fed on evergreens.
(D) The mastodon's diet consisted primarily of water plants such as marsh grasses and water lilies.
(E) Evergreen forests were inhabited by many species of large mammals until the end of the Ice Age.

Originally posted by nusmavrik on 18 Jun 2010, 10:20.
Last edited by broall on 10 Mar 2018, 01:58, edited 1 time in total.
Manager
Joined: 25 May 2010
Posts: 129
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

20 Jun 2010, 04:49
18
5
A GMAX tip! When answering a strengthening or assumption question, identify the single sentence that is the conclusion, in your head, add the word 'because', and then read the answer choice. The resulting sentence should flow logically.

Try this with answer choice B, and you should 'hear' the problem:

"The disappearance of wetlands caused the mastodon's extinction because the draining of the glacial wetlands left a new topography." You still have to explain why topography caused the extinction of the mastodons.

Now 'listen' to D:
"The disappearance of the wetlands caused the mastodon's extinction because the mastodons fed on wetland plants." The sentence makes explicit the mastodon's reliance on the wetlands.

If you have to add an extra explanation in your head to make the sentence make sense, then there's a problem.
##### General Discussion
Current Student
Joined: 12 Nov 2008
Posts: 361
Schools: Ross (R2), Cornell (R3) , UNC (R3) , INSEAD (R1 Jan)
WE 2: FP & Analysis (2 yrs at matriculation)
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

18 Jun 2010, 12:23
D, since draining of the glacial wetlands would lead to decreased food supply for the mastodon.
Director
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 26 Nov 2009
Posts: 734
Location: Singapore
Concentration: General Management, Finance
Schools: Chicago Booth - Class of 2015
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

18 Jun 2010, 18:12
thanks. why isn't B ? Pls elaborate.

ariel wrote:
D, since draining of the glacial wetlands would lead to decreased food supply for the mastodon.
Intern
Joined: 20 Apr 2010
Posts: 12
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

18 Jun 2010, 22:14
It cannot be B because it does does give a relationship between the drained glacial wetlands and mastodon, we are not suppossed to assume anything, D is more elaborate and logical.
Director
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 26 Nov 2009
Posts: 734
Location: Singapore
Concentration: General Management, Finance
Schools: Chicago Booth - Class of 2015
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

19 Jun 2010, 02:55
we are not suppossed to assume anything -----> I didn't get the point. Pls elaborate.

There are 2 theories here. And the answer will weaken the first and strengthen the latter.

ParvezDhamani wrote:
It cannot be B because it does does give a relationship between the drained glacial wetlands and mastodon, we are not suppossed to assume anything, D is more elaborate and logical.
Manager
Joined: 17 Oct 2008
Posts: 133
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

19 Jun 2010, 03:49
hmm.B!

disappearance of evergreen forests could be one possible effect of new topology caused by the draining of glacial wetlands
Intern
Affiliations: NCC,SAE,YHIA
Joined: 04 May 2010
Posts: 35
Location: Mumbai , India
WE 1: 3 years international sales & mktg-projects
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

16 Sep 2010, 11:33
Good explanation SaraiGMAXonline

Nice method to double check strengthen question and fish out last of the contenders.
_________________

Sun Tzu-Victorious warriors win first and then go to war, while defeated warriors go to war first and then seek to win.

Non-Human User
Joined: 01 Oct 2013
Posts: 3637
Re: The mastodon, a large mammal resembling today's elephant,  [#permalink]

### Show Tags

05 Sep 2018, 10:22
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: The mastodon, a large mammal resembling today's elephant,   [#permalink] 05 Sep 2018, 10:22
Display posts from previous: Sort by