Find all School-related info fast with the new School-Specific MBA Forum

It is currently 25 Oct 2014, 08:08

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Tiger beetles are such fast runners that they can capture

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 21 Sep 2012
Posts: 238
Followers: 1

Kudos [?]: 137 [0], given: 63

Tiger beetles are such fast runners that they can capture [#permalink] New post 06 Dec 2012, 08:08
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

34% (02:37) correct 66% (01:50) wrong based on 88 sessions
Tiger beetles are such fast runners that they can capture virtually any nonflying insect. However, when running toward an insect, a tiger beetle will intermittently stop and then, a moment later, resume its attack. Perhaps the beetles cannot maintain their pace and must pause for a moment’s rest; but an alternative hypothesis is that while running, tiger beetles are unable to adequately process the resulting rapidly changing visual information and so quickly go blind and stop.

Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?

A) When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately stops and runs away without its usual intermittent stopping.
(B) In pursuing a swerving insect, a beetle alters its course while running and its pauses become more frequent as the chase progresses.
(C) In pursuing a moving insect, a beetle usually responds immediately to changes in the insect’s direction, and it pauses equally frequently
whether the chase is up or down an incline.
(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
(E) The faster a beetle pursues an insect fleeing directly away from it, the more frequently the beetle stops.


OA B



In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was 10 years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

(A) A few children still use traditional wooden sleds.
(B) Very few children wear any kind of protective gear, such as helmets, while sledding.
(C) Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.
(D) Most sledding injuries occur when a sled collides with a tree, a rock, or another sled.
(E) Because the traditional wooden sleds can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

need detailed explanations. Thanks!
[Reveal] Spoiler: OA
2 KUDOS received
Current Student
avatar
Status: Final Lap Up!!!
Affiliations: NYK Line
Joined: 21 Sep 2012
Posts: 1097
Location: India
GMAT 1: 410 Q35 V11
GMAT 2: 530 Q44 V20
GMAT 3: 630 Q45 V31
GPA: 3.84
WE: Engineering (Transportation)
Followers: 31

Kudos [?]: 276 [2] , given: 67

Re: Tiger beetles are such fast runners that they can capture vi [#permalink] New post 06 Dec 2012, 10:11
2
This post received
KUDOS
nelz007 wrote:
Tiger beetles are such fast runners that they can capture virtually any nonflying insect. However, when running toward an insect, a tiger beetle will intermittently stop and then, a moment later, resume its attack. Perhaps the beetles cannot maintain their pace and must pause for a moment’s rest; but an alternative hypothesis is that while running, tiger beetles are unable to adequately process the resulting rapidly changing visual information and so quickly go blind and stop.

Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?

A) When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately stops and runs away without its usual intermittent stopping.
(B) In pursuing a swerving insect, a beetle alters its course while running and its pauses become more frequent as the chase progresses.
(C) In pursuing a moving insect, a beetle usually responds immediately to changes in the insect’s direction, and it pauses equally frequently
whether the chase is up or down an incline.
(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
(E) The faster a beetle pursues an insect fleeing directly away from it, the more frequently the beetle stops.


I ll take one question at a time......
As per question we have to select an option that strengthens one and undermines the other.......Its better to take a note of both the hypothesis
1st one: Perhaps the beetles cannot maintain their pace and must pause for a moment’s rest. <<In simple terms it says it stops so as to gain more energy>>
2nd one : tiger beetles are unable to adequately process the resulting rapidly changing visual information and so quickly go blind and stop.<<it says that beetle is blind so it stops and than run>>
I think its clear that B and C are contenders.... Lets take one by one.

(C) In pursuing a moving insect, a beetle usually responds immediately to changes in the insect’s direction, and it pauses equally frequently whether the chase is up or down an incline. the portion which is highlighted is extremely important should be read and comprehend very carefully. Normally running downhill does not require too much energy its an established fact. If the beetle stops while running downhill that means it gets tired when moving down. When it is running up the incline compared to downward chase should stop for more time but as mentioned in the argument it stops for the same interval. Hence its contradictory to an established fact, Moreover it is neither strengthening the hypothesis that deals with energy nor does it weakens.
Hence weaken dump this option choice.

(B) In pursuing a swerving insect, a beetle alters its course while running and its pauses become more frequent as the chase progresses.

The bold portion weakens the fact that the beetle is blind since it alters its course while chasing and the underlined portion strengthens the fact that it stops to take rest.
Hence B is the right answer.

---------------------------------------------------------
Consider Kudos if my post helped!!!! :-D
1 KUDOS received
Current Student
avatar
Status: Final Lap Up!!!
Affiliations: NYK Line
Joined: 21 Sep 2012
Posts: 1097
Location: India
GMAT 1: 410 Q35 V11
GMAT 2: 530 Q44 V20
GMAT 3: 630 Q45 V31
GPA: 3.84
WE: Engineering (Transportation)
Followers: 31

Kudos [?]: 276 [1] , given: 67

Re: Tiger beetles are such fast runners that they can capture vi [#permalink] New post 06 Dec 2012, 10:27
1
This post received
KUDOS
nelz007 wrote:
In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was 10 years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

(A) A few children still use traditional wooden sleds.
(B) Very few children wear any kind of protective gear, such as helmets, while sledding.
(C) Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.
(D) Most sledding injuries occur when a sled collides with a tree, a rock, or another sled.
(E) Because the traditional wooden sleds can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

need detailed explanations. Thanks!


Hi nelz
this one i dont think is tough....
Injury cases involving children sledding on plastic sleds as compared to cases in which wooden sleds were used is fewer. Hence plastic sleds are dangerous is unjustified.

Though through POE only B and C are left. B is totally out of scope hence only C remains and can be the answer..

For sake of explanation i try to elaborate why i consider C as the correct answer.
(C) Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can. We have to weaken the fact that since no accident
in past can be referred in which child was sledding on plastic sleds hence plastic sled is not dangerous.
May be that plastic sleds are used in a snow condition that is not prone to accident as it can be used in different snow conditions. But this does not establishes the fact that it is not dangerous... may be until now it is never used in a condition which is prone to accident.

--------------------------------------------
Consider Kudos if my post helped!! :-D
1 KUDOS received
Manager
Manager
avatar
Joined: 27 Feb 2012
Posts: 138
Followers: 1

Kudos [?]: 20 [1] , given: 22

Re: Tiger beetles are such fast runners that they can capture vi [#permalink] New post 06 Dec 2012, 10:31
1
This post received
KUDOS
In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was 10 years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

(A) A few children still use traditional wooden sleds.
(B) Very few children wear any kind of protective gear, such as helmets, while sledding.
(C) Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.
(D) Most sledding injuries occur when a sled collides with a tree, a rock, or another sled.
(E) Because the traditional wooden sleds can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

We need to weaken the evidence and not conclusion.
Conclusion: The concern that plastic sleds are more dangerous.
Evidence: the number of children injured while sledding was much higher last winter than it was ten years ago.

Close between B and C
C is the only choice that weakens evidence by providing an alternative .
B dont report any time frame. Is this habit old or new? B out
_________________

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Please +1 KUDO if my post helps. Thank you.

Manager
Manager
avatar
Joined: 21 Sep 2012
Posts: 238
Followers: 1

Kudos [?]: 137 [0], given: 63

Re: Tiger beetles are such fast runners that they can capture vi [#permalink] New post 06 Dec 2012, 19:13
Archit143 wrote:
nelz007 wrote:
In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was 10 years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

(A) A few children still use traditional wooden sleds.
(B) Very few children wear any kind of protective gear, such as helmets, while sledding.
(C) Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.
(D) Most sledding injuries occur when a sled collides with a tree, a rock, or another sled.
(E) Because the traditional wooden sleds can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

need detailed explanations. Thanks!


Hi nelz
this one i dont think is tough....
Injury cases involving children sledding on plastic sleds as compared to cases in which wooden sleds were used is fewer. Hence plastic sleds are dangerous is unjustified.

Though through POE only B and C are left. B is totally out of scope hence only C remains and can be the answer..

For sake of explanation i try to elaborate why i consider C as the correct answer.
(C) Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can. We have to weaken the fact that since no accident
in past can be referred in which child was sledding on plastic sleds hence plastic sled is not dangerous.
May be that plastic sleds are used in a snow condition that is not prone to accident as it can be used in different snow conditions. But this does not establishes the fact that it is not dangerous... may be until now it is never used in a condition which is prone to accident.

--------------------------------------------
Consider Kudos if my post helped!! :-D


I was debating between C and E. I realized, my mistake didn't understand the argument to well. Thanks for the explanation! I've noticed though in the most seriously weakens question there are usually 2 weakener's present, have to pick the stronger one...

@Bangon thanks for pointing out the conclusion / evidence part that was a silly error on my part!
Re: Tiger beetles are such fast runners that they can capture vi   [#permalink] 06 Dec 2012, 19:13
    Similar topics Author Replies Last post
Similar
Topics:
Tiger beetles are such fast runners that they can capture sondenso 1 10 May 2008, 18:00
3 Tiger beetles are such fast runners that they can capture vina 11 16 Jul 2007, 10:40
Tiger beetles are such fast runners that they can capture ceointhemaking 0 01 Jul 2013, 02:28
Tiger beetles are such fast runners that they can capture kdhong 0 19 Dec 2005, 21:05
Tiger beetles are such fast runners that they can capture Pauline 0 02 Sep 2012, 21:54
Display posts from previous: Sort by

Tiger beetles are such fast runners that they can capture

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.