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

It is currently 14 Jul 2014, 02:42

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

Although an insecticide may initially prove effective in

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
AGSM Thread Master
User avatar
Joined: 19 Jul 2012
Posts: 167
Location: India
Concentration: Marketing, International Business
GMAT 1: 630 Q49 V28
GPA: 3.3
Followers: 5

Kudos [?]: 73 [0], given: 31

Re: Although an insecticide may initially prove effective [#permalink] New post 25 Nov 2012, 22:35
gmatbull wrote:
@ Vineetk,

For B, yes, that's precisely how I feel it should have been worded.

E: older mosquitoes are LESS susceptible to insecticide THAN the younger ones. The older ones are more difficult to
kill with the insecticide.

If Older ones transfer immunity genes to younger ones, and are more difficult to eliminate, then any such plan that
will eliminate the older ones will assure the researchers that malaria will be curtailed.

This is my opinion....


There are 2 objectives to meet in the argument:

1. Lifecycle should continue.
2. Killing only old mosquito.

Option B meets both the objective in which the lifecycle of mosquito can continue and killing of old mosquito can happen.
Option E does not meet the second objective.
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesVeritas Prep GMAT Discount Codes
Intern
Intern
avatar
Joined: 29 Oct 2012
Posts: 8
GMAT Date: 12-22-2012
GPA: 3.67
WE: Other (Energy and Utilities)
Followers: 0

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

Re: Although an insecticide may initially prove effective [#permalink] New post 26 Nov 2012, 01:51
Archit143 wrote:
I seriously doubt the OA reason since B states that old mosquitoes have completed their breeding cycle that means they wont breed anymore and they have passed on their resistance. Either the option is out of scope or an interpretation.


I see where you're going with this - I guess from my perspective, the difference is when the older mosquitos become resistant to the pesticide. My interpretation was that it is only after coming into contact with the said pesticides that the resistance is contracted. Therefore, if the mosquitos don't come into contact with the pesticides until they are of the age to be 'targeted' by this new spraying scheme, then any procreation that took place prior to being targeted would not pass down the resistance as they are not yet resistant themselves.

This was the reason why I chose 'B', but I do see where there could be confusion between answers E & B - it all depends if the mosquitos are resistant prior to being targeted or not, which the passage is not entirely clear about.
VP
VP
avatar
Status: Final Lap Up!!!
Affiliations: NYK Line
Joined: 21 Sep 2012
Posts: 1095
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 [?]: 238 [0], given: 67

Re: Although an insecticide may initially prove effective [#permalink] New post 26 Nov 2012, 02:55
Vineetk wrote:
gmatbull wrote:
@ Vineetk,

For B, yes, that's precisely how I feel it should have been worded.

E: older mosquitoes are LESS susceptible to insecticide THAN the younger ones. The older ones are more difficult to
kill with the insecticide.

If Older ones transfer immunity genes to younger ones, and are more difficult to eliminate, then any such plan that
will eliminate the older ones will assure the researchers that malaria will be curtailed.

This is my opinion....


There are 2 objectives to meet in the argument:

1. Lifecycle should continue.
2. Killing only old mosquito.

Option B meets both the objective in which the lifecycle of mosquito can continue and killing of old mosquito can happen.
Option E does not meet the second objective.


Can u mention excerpts from the argument that says that Lifecycle shoul continue.

If u are cosidering the highlighted part mentioned below than its wrong.
Because the presence of older mosquitoes—those ten or more days old—is essential to maintaining the life cycle of the malaria parasite,
The argument is concerned with killing the older mosquitoes especially the ones which are more than 10 weeks old because they help in thriving the life cycle.
I request gmatbull to post the OE
Expert Post
Magoosh GMAT Instructor
User avatar
Joined: 28 Dec 2011
Posts: 1918
Followers: 461

Kudos [?]: 1794 [0], given: 29

Re: Although an insecticide may initially prove effective in [#permalink] New post 08 Apr 2013, 09:13
Expert's post
gmatbull wrote:
Although an insecticide may initially prove effective in reducing malaria-causing mosquito populations, the surviving mosquitoes, genetically endowed to withstand the insecticide, thrive on the reduced competition from other mosquitoes and pass on their genetically based resistance to their offspring. Mosquito populations then become less and less susceptible to the insecticides. Because the presence of older mosquitoes—those ten or more days old—is essential to maintaining the life cycle of the malaria parasite, researchers have proposed addressing the problem of pesticide resistance by searching for a means of targeting only older mosquitoes for elimination.

Which of the following, if true, would most help support the researchers’ proposal?

A. Younger mosquitoes are also essential to the life cycle of the malaria parasite.
B. The older mosquitoes have completed their breeding activity.
C. The proposed approach to controlling mosquito populations is likely to require more frequent applications of pesticides.
D. Malaria is only transmitted to humans by mosquito bites.
E. The older mosquitoes are not as susceptible to insecticides as younger mosquitoes.

Quote:
Hi Mike, I am not able to understand how come option B strengthens the argument. As per me option E strengthens the argument. Can you kindly explain where am i making a mistake, if any. Waiting eagerly for your valuable inputs. Regards, Fame

Fame,
I would say you are confused because this is a poorly written question. In a good GMAT CR question, it may be confusing when thinking it through, but when the OA & OE are revealed, everyone has an "aha!" and feels that it makes sense.

I tend to agree with VeritasPrepKarishma's excellent analysis above. In her view, the scientists want to kill mosquitoes but leave the inter-mosquito competition intact. If they kill the older mosquitoes, this will have the advantage of killing mosquitoes that are "essential to maintaining the life cycle of the malaria parasite" without reducing genetic competition in the mosquito population. Among other things, the question expect the non-scientist reader to know that, by the "malaria parasite", they mean the protist that cause malaria, i.e. that malaria is carried by a parasite that lives in the mosquito. I think the question demands a bit too much outside knowledge of science --- I don't think the GMAT would automatically expect the reader to know the details of how genetic competition plays out or the details of how malaria is carried or transmitted. I think it's very very easy to write a hard CR question if it involves specialized knowledge of some scientific field, knowledge that maybe folks learned at one time in high school but is not uppermost in their minds. I think it's much harder to write a CR question that treats everyday topics that are well-known to everyone, that is puzzling to many readers on first reading, but that makes complete sense to everyone once the OE is given. The GMAT does this consistently with its CR question. This particular question falls well short of that standard.

That's my 2¢

Mike :-)
_________________

Mike McGarry
Magoosh Test Prep

Image

Image

Intern
Intern
avatar
Joined: 06 Mar 2012
Posts: 36
Location: India
Concentration: Operations, International Business
GPA: 3.4
Followers: 1

Kudos [?]: 11 [0], given: 12

Re: Although an insecticide may initially prove effective in [#permalink] New post 13 Apr 2013, 00:18
Although I picked 'E', I am not fully convinced with any of the answer options. Can an expert please explain ?
Re: Although an insecticide may initially prove effective in   [#permalink] 13 Apr 2013, 00:18
    Similar topics Author Replies Last post
Similar
Topics:
5 Experts publish their posts in the topic Antibiotics prove to be the only effective means of treating guerrero25 7 29 Jul 2013, 23:04
Although today it is cost-effective to make perfumes with einstein10 3 29 Apr 2010, 19:04
CR_Insecticides ugo_castelo 17 05 Nov 2006, 06:02
The economic forces that may effect the new public offering beyondinfinity 10 02 May 2006, 10:53
Children who attended private high schools may initially rchadha 10 05 Aug 2005, 15:49
Display posts from previous: Sort by

Although an insecticide may initially prove effective in

  Question banks Downloads My Bookmarks Reviews Important topics  

Go to page   Previous    1   2   [ 25 posts ] 



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®.