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

 It is currently 21 Feb 2019, 16:09

### 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

# Biologists have posited one reason why the giant tortoise,

Author Message
TAGS:

### Hide Tags

Manager
Joined: 30 Jun 2011
Posts: 194
Biologists have posited one reason why the giant tortoise,  [#permalink]

### Show Tags

17 Jun 2012, 16:56
1
5
00:00

Difficulty:

65% (hard)

Question Stats:

54% (01:44) correct 46% (02:00) wrong based on 418 sessions

### HideShow timer Statistics

Biologists have posited one reason why the giant tortoise, thought to be the animal with the longest life span in the world, enjoys such longevity. They argue that large, well-protected animals such as the tortoise can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age.

Which of the following most strengthens the biologists' argument?

(A) Tortoises that procreate quickly and at an early age tend to live longer than tortoises that devote their resources to protecting themselves.

(B) Animals that procreate early, such as fruit flies, have shorter lifespans.

(C) The oldest tortoises on record live about twice as long as the oldest humans in history.

(D) Tortoises lay between one and thirty eggs at a time, while other animals may lay hundreds.

(E) Tortoises who face less pressure from predators tend to have longer lifespans.

Senior Manager
Joined: 13 Jan 2012
Posts: 282
Weight: 170lbs
GMAT 1: 740 Q48 V42
GMAT 2: 760 Q50 V42
WE: Analyst (Other)
Re: longest life span in the world  [#permalink]

### Show Tags

17 Jun 2012, 17:55
I like to do CR in POE style as it's quickest:

- A does not strengthen. Eliminate.
- B is decent. Keep for now.
- C is out of context. Eliminate.
- D is out of context. Eliminate.
- E is decent. Keep for now.

Answer is clearly B or E.

I think we'll go with B here as the implications extend beyond just tortoises and therefore add a good deal of evidence to the broader argument.

OA = B
Intern
Joined: 03 Jun 2012
Posts: 27
Location: United States
WE: Project Management (Computer Software)
Re: longest life span in the world  [#permalink]

### Show Tags

17 Jun 2012, 18:59
The given argument is claiming that there is a trade-off between devoting biological resources to longevity and devoting them to procreating quickly. Only B comes close to strengthening this assumption of a trade-off.
Manager
Joined: 30 Jun 2011
Posts: 194
Re: longest life span in the world  [#permalink]

### Show Tags

18 Jun 2012, 05:45
ARGUMENT: well-protected animals can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age

Do we have to strengthen the argument ONLY ..... OR ..... we have to strengthen the argument in such a way that "Tortoise has longest life span" is also STRENGTHENED.

I am asking this because B strengthens the argument but does not strengthen the argument so that it can explain the reason for longer life span of tortoise
Kaplan GMAT Instructor
Joined: 25 Aug 2009
Posts: 635
Location: Cambridge, MA
Re: longest life span in the world  [#permalink]

### Show Tags

18 Jun 2012, 11:07
1
vikram4689 wrote:
Biologists have posited one reason why the giant tortoise, thought to be the animal with the longest life span in the world, enjoys such longevity. They argue that large, well-protected animals such as the tortoise can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age.

Which of the following most strengthens the biologists' argument?

(E) Tortoises who face less pressure from predators tend to have longer lifespans.

What's the source on this problem?

I've been typing and deleting responses to it for the past fifteen minutes, because every time I read this answer choice I get a different meaning from it. This answer raises two questions: 1) are we discussing Giant Tortoises in particular, or tortoises as a family or related animals? And 2) are we discussion lifespans assuming the tortoises aren't eaten, or are we factoring attrition from predation into the average lifespan?

I think the confusion some posters have from choice (E) comes from the reading that some types of tortoises are less "well-protected" than others, and therefore are likely to have shorter lifespans due to a different expenditure of biological resource. But I think that (E) actually says that the average lifespan of the tortoise is lower because some tortoises are eaten by predators, which is in fact a tautology and therefore irrelevant!
_________________

Eli Meyer
Kaplan Teacher
http://www.kaptest.com/GMAT

Prepare with Kaplan and save \$150 on a course!

Kaplan Reviews

Magoosh GMAT Instructor
Joined: 28 Nov 2011
Posts: 301
Re: longest life span in the world  [#permalink]

### Show Tags

18 Jun 2012, 12:18
1
The argument isn't too difficult to take apart: the more well-protected a species the more likely it will live long (think of a tortoise's giant shell); the less well-protected the more likely it will try to procreate as quickly as possible (I'm thinking rabbits here ). By extension, the sooner a species tries to procreate the shorter its lifespan.

As for the best answer, it gets a little trickier...

(A) Tortoises that procreate quickly and at an early age tend to live longer than tortoises that devote their resources to protecting themselves.

The real issue is between species. That is, we want to compare well-protected to not-so-well-protected species in terms of longevity. Anyhow, this answer choice apparently goes against the conclusion.

(B) Animals that procreate early, such as fruit flies, have shorter lifespans. ANSWER

Here we have an animal that procreates early (the fruit fly, all 50mg of it, just isn't too well protected) try to multiply as soon as possible. Again, the argument is stating that the less well-protected/sooner procreating species tends to have a shorter lifespan. This answer choice is by no means a homerun answer that makes you think, 'hey this is obviously it!' After all, we do not have much information on well-protected/wait-to-procreate species. Nonetheless, the answer lends some credence to the view, so I'll keep it.

(C) The oldest tortoises on record live about twice as long as the oldest humans in history.

We need to know a little bit more about when exactly the tortoise starts procreating. Sure, the turtle lives to well over 100 years, but when does it start procreating compared to a human?

(D) Tortoises lay between one and thirty eggs at a time, while other animals may lay hundreds.

Sure, but perhaps there are many animals that lay fewer than 30 eggs (and presumably they do not live as long as the longest-living species). Anyhow, we are concerned with the 'when' not the 'how' of procreation.

(E) Tortoises who face less pressure from predators tend to have longer lifespans.

Like (A), this answer choice focuses on tortoises. The correct answer has to discuss less well-protected species and their longevity/age of procreation. This answer choice may be tempting because it states something that is logically sound: tortoises that are not prey tend to live longer.

And like that, the only correct answer left standing is (B).

Hope that helps
_________________

Christopher Lele
Magoosh Test Prep

Manager
Joined: 30 Jun 2011
Posts: 194
Re: longest life span in the world  [#permalink]

### Show Tags

18 Jun 2012, 16:51
Chris,
your explanation seems to refer exactly the issue that i asked above longest-life-span-in-the-world-134604.html#p1097553 However, i would like to confirm it once again Please read the link. I have also clarified my view below

Earlier i thought that i have to strengthen the LINK between Argument and 1st sentence of stimulus. Here ARGUMENT: well-protected animals can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age and i thought that i have to strengthen the argument in such a way that it makes us more likely to believe that "tortoise has longer lifespan"

But it seems we to strengthen the argument standalone without thinking whether argument makes us more likely to believe that "tortoise has longer lifespan". Is it common for GMAT to ask such question. i mean i have never seen any question where any given info. is NOT required. 1st statement is NOT required if we want to strengthen ARGUMENT STANDALONE

P.S. here my concern is to understand how to respond to such ques STEMS
Kaplan GMAT Instructor
Joined: 25 Aug 2009
Posts: 635
Location: Cambridge, MA
Re: longest life span in the world  [#permalink]

### Show Tags

18 Jun 2012, 19:50
vikram4689 wrote:
ARGUMENT: well-protected animals can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age

Do we have to strengthen the argument ONLY ..... OR ..... we have to strengthen the argument in such a way that "Tortoise has longest life span" is also STRENGTHENED.

I am asking this because B strengthens the argument but does not strengthen the argument so that it can explain the reason for longer life span of tortoise
Stenghtening the "argument" always means strengthening the link between the supporting evidence and the conclusion that it supports. In this case, the word "posited" is the giveaway--the REASON, not the age of the tortoise, is the conclusion. Therefore, we are supporting the reason, not the fact that tortoises have a long life.

Hope this helps!
_________________

Eli Meyer
Kaplan Teacher
http://www.kaptest.com/GMAT

Prepare with Kaplan and save \$150 on a course!

Kaplan Reviews

Manager
Joined: 30 Jun 2011
Posts: 194
Re: longest life span in the world  [#permalink]

### Show Tags

19 Jun 2012, 01:28
KapTeacherEli wrote:
vikram4689 wrote:
ARGUMENT: well-protected animals can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age

Do we have to strengthen the argument ONLY ..... OR ..... we have to strengthen the argument in such a way that "Tortoise has longest life span" is also STRENGTHENED.

I am asking this because B strengthens the argument but does not strengthen the argument so that it can explain the reason for longer life span of tortoise
Stenghtening the "argument" always means strengthening the link between the supporting evidence and the conclusion that it supports. In this case, the word "posited" is the giveaway--the REASON, not the age of the tortoise, is the conclusion. Therefore, we are supporting the reason, not the fact that tortoises have a long life.

Hope this helps!

I got confused with your reply. First you said that strengthening means strengthening the LINK but later you said we are supporting the reason, which is the conclusion.

strengthening the LINK means strengthening the ARGUMENT in such a way that "tortoise has larger life span" is STRENGTHENED whereas
strengthening the ARGUMENT means simply strengthening the argument without giving a thought whether "tortoise has larger life span" is STRENGTHENED or NOT
Magoosh GMAT Instructor
Joined: 28 Nov 2011
Posts: 301
Re: longest life span in the world  [#permalink]

### Show Tags

19 Jun 2012, 05:30
Hi Vikram,

I don't think it's that common to find an answer choice that only addresses the extreme opposite case of what the argument is asking. That is, to strengthen that tortoises live longer and take their time to procreate, we invoke the exact opposite: fruit flies, which have a very short life span, procreate very quickly. At the same time, out of the answer choice, it is the best answer. For your GMAT studying, I would recommend just moving beyond this question and sticking to official material. You should be wrestling with the correct answer choices there, instead of on material that doesn't give the best approximation of the exam.

Hope that helps!
_________________

Christopher Lele
Magoosh Test Prep

Manager
Joined: 30 Jun 2011
Posts: 194
Re: longest life span in the world  [#permalink]

### Show Tags

Updated on: 19 Jun 2012, 07:34
ChrisLele wrote:
Hi Vikram,

I don't think it's that common to find an answer choice that only addresses the extreme opposite case of what the argument is asking. That is, to strengthen that tortoises live longer and take their time to procreate, we invoke the exact opposite: fruit flies, which have a very short life span, procreate very quickly. At the same time, out of the answer choice, it is the best answer. For your GMAT studying, I would recommend just moving beyond this question and sticking to official material. You should be wrestling with the correct answer choices there, instead of on material that doesn't give the best approximation of the exam.

Hope that helps!

Sure i agree that such ques. is uncommon. However, i would like to understand this one We are asked to strengthen the argument, but argument doesn't deal with tortoise having longest life span. Argument is following line only "ARGUMENT: well-protected animals can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age" Do you agree ?

2nd ques. : How does B strengthens that tortoise has longest life span
3rd ques. : Can i eliminate E on the basis that it merely restates info. in Premises and answer to STRENGTHEN ques. NEVER restate a premise

Originally posted by vikram4689 on 19 Jun 2012, 06:41.
Last edited by vikram4689 on 19 Jun 2012, 07:34, edited 1 time in total.
Manager
Joined: 15 Sep 2009
Posts: 199
Re: longest life span in the world  [#permalink]

### Show Tags

19 Jun 2012, 07:01
B is the only answer that gives some evidence of the link between a shorter lifespan and a tendency to procreate quickly and bountifully.

Cheers.
_________________

+1 Kudos me - I'm half Irish, half Prussian.

Manager
Status: Time to apply!
Joined: 24 Aug 2011
Posts: 127
Location: India
Concentration: Finance, Entrepreneurship
GMAT 1: 600 Q48 V25
GMAT 2: 660 Q50 V29
GMAT 3: 690 Q49 V34
GPA: 3.2
WE: Engineering (Computer Software)
Re: Biologists have posited one reason why the giant tortoise  [#permalink]

### Show Tags

23 Jun 2012, 23:23
Let me try this out ...

Biologists have posited one reason why the giant tortoise, thought to be the animal with the longest life span in the world, enjoys such longevity. They argue that large, well-protected animals such as the tortoise can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age.

Which of the following most strengthens the biologists' argument?

Generally , for strengthen questions, we extract the conclusion of the argument quite easily by using the conclusion indicators like 'thus' , 'therefore' etc.
But here I found it difficult as there was no such indicators.

CONCLUSION : Tortoises enjoy longevity

WHY : Large, well-protected animals can devote more biological resources to longevity, while animals that are more vulnerable devote their resources to procreating quickly and at an early age.

(A) Tortoises that procreate quickly and at an early age tend to live longer than tortoises that devote their resources to protecting themselves.
This is exactly opposite to what is being told by the stimulus. The stimulus says that : "animals that are more vulnerable devote their resources to procreating quickly and at an early age."

(B) Animals that procreate early, such as fruit flies, have shorter lifespans.

Out of the various ways we can strengthen an argument, one way is : Arguments that use some examples , analogies or surveys rely upon the validity of those examples , analogies or surveys . Now if we get an answer choice which strengthen the examples , analogies or surveys , or establishes their soundness, such answer choice is usually correct.

This option has strengthen the relation : procreate early means shorter lifespan .
Hence this can be the correct choice

(C) The oldest tortoises on record live about twice as long as the oldest humans in history.

We are not interested to know how long a tortoise can live. We are interested in knowing why a tortoise can live for longer spans

(D) Tortoises lay between one and thirty eggs at a time, while other animals may lay hundreds.

This option says : "other animals may lay hundreds" and not " other animals lay hundreds". The statement is not that strong.There may be some animals which lay less than 30 eggs at a time and still live for lesser life span. We don't know.

(E) Tortoises who face less pressure from predators tend to have longer lifespans.
Here we are giving another reason why a tortoise may have longer lifespan. Hence this choice actually weakens the argument

We have only 1 contender, so answer is B.
_________________

Didn't give up !!! Still Trying!!

Senior Manager
Status: Final Countdown
Joined: 17 Mar 2010
Posts: 431
Location: United States (NY)
GPA: 3.82
WE: Account Management (Retail Banking)
Re: Biologists have posited one reason why the giant tortoise  [#permalink]

### Show Tags

23 Jun 2012, 23:48
IMO-B
easy one.
B clearly explains and provide extended illustration for the argument that "....while animals that are more vulnerable devote their resources to procreating quickly and at an early age".
A-no comparison is asked between "the Tortoises that procreate quickly" and " tortoises that devote their resources to protecting themselves".
B-Correct choice
C-Human vs tortoise comparison is irrelevant.
D-Laying of eggs and its comparison is not asked.
E-Predator has no role in this argument.

Stick to the conclusion and try to figure out the option which links directly to the conclusion.
_________________

" Make more efforts "
Press Kudos if you liked my post

Non-Human User
Joined: 01 Oct 2013
Posts: 3637
Re: Biologists have posited one reason why the giant tortoise,  [#permalink]

### Show Tags

30 Dec 2017, 23:46
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: Biologists have posited one reason why the giant tortoise,   [#permalink] 30 Dec 2017, 23:46
Display posts from previous: Sort by