Last visit was: 27 Apr 2026, 01:12 It is currently 27 Apr 2026, 01:12
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
User avatar
itspCv2
Joined: 06 May 2020
Last visit: 18 Jun 2021
Posts: 32
Own Kudos:
Given Kudos: 11
Location: India
Schools: HEC '22
Schools: HEC '22
Posts: 32
Kudos: 115
Kudos
Add Kudos
Bookmarks
Bookmark this Post
avatar
silverprince
Joined: 30 Mar 2018
Last visit: 28 Sep 2021
Posts: 25
Own Kudos:
Given Kudos: 115
Location: United Kingdom
GMAT 1: 660 Q42 V38
GPA: 4
GMAT 1: 660 Q42 V38
Posts: 25
Kudos: 38
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Stanindaw
Joined: 11 Dec 2020
Last visit: 18 Apr 2026
Posts: 127
Own Kudos:
Given Kudos: 73
Location: India
Concentration: Operations, Economics
GMAT Focus 1: 615 Q80 V80 DI77
GPA: 3.7
Products:
GMAT Focus 1: 615 Q80 V80 DI77
Posts: 127
Kudos: 55
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
sanjayparihar16
Joined: 12 Apr 2018
Last visit: 03 Dec 2024
Posts: 153
Own Kudos:
Given Kudos: 426
Posts: 153
Kudos: 146
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Stanindaw
KarishmaB
vina
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.

Please explain the answers.

Responding to a pm:

The OA given in the book is (B) and that is non debatable.

There are two hypotheses:

- the beetles cannot maintain their pace and must pause for a moment's rest;
- while running, tiger beetles are unable to adequately process the resulting rapidly changing visual information and so quickly go blind and stop

What would support one of the two hypotheses and undermine the other?

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

If the beetle alters its course while running, it is obviously processing changing visual information and changing its course accordingly WHILE running.

If it pauses more frequently as the chase progresses, it is tiring out more and more because of the long chase and hence taking more frequent breaks.

Option (B) strengthens "it cannot maintain its speed and pauses for rest" and undermines "it cannot process rapidly changing visual information"


(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.

This undermines both the hypotheses.

If it responds immediately to changes in direction, it is able to process changing visual information.

If it takes similar pauses going up or down, it is not the effort of running that is making it take the pauses. Otherwise, going up it would have taken more pauses since it takes more effort going up.

(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.

It might strengthen that the beetle is not able to respond to changing visual information since it decides whether it is giving up or not after pausing (in case there is a certain stance that tells us that it has paused) but it doesn't undermine that it pauses to rest. It is very possible that it pauses to rest and at that time assesses the situation and decides whether it wants to continue the chase.

(E) The faster a beetle pursues an insect fleeing directly away from it, the more frequently the beetle stops.

This strengthens both the hypotheses. The faster it runs, the more rest it would need. The faster it runs, the more rapidly visual information would change and more it will need to pause.

Only option (B) strengthens one and undermines the other.

Answer (B)

I have a doubt with D.
Question Stem: TB can capture virtually any insect.
Option D: If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit

TB pauses, and it paused either it is tired or to process the visual information
Say it paused because it is tired, therfore ended the pursuit
On the other hand
Say it paused because it is processing the visual information, then why would it end the pursuit? Since the question stem says that it can capture any insect.

Great observation but this doesn't strengthen one factor and weaken the other factor, so incorrect for that reason. We can keep anticipating what could have been reason. Moreover, it doesn't talk about the fast moving insect or the reason for TB's end of pursuit.
User avatar
VerbalBot
User avatar
Non-Human User
Joined: 01 Oct 2013
Last visit: 04 Jan 2021
Posts: 19,420
Own Kudos:
Posts: 19,420
Kudos: 1,010
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club VerbalBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
   1   2 
Moderators:
GMAT Club Verbal Expert
7391 posts
506 posts
361 posts