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

 It is currently 14 Oct 2019, 16:03

### 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

# By competing with rodents for seeds, black ants help control

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 11 Feb 2007
Posts: 290
By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

Updated on: 08 Sep 2018, 23:17
1
19
00:00

Difficulty:

5% (low)

Question Stats:

89% (01:32) correct 11% (01:54) wrong based on 2553 sessions

### HideShow timer Statistics

By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of black ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.

Which of the following, if true, most strengthens the argument?

(A) Ant flies do not attack black ants other than Loma ants.

(B) Loma ants are less effective than many bird species in competing with rodents for seeds.

(C) Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds.

(D) The sting of Loma ants can also be fatal to rodents.

(E) The use of pesticides to control Loma ants could have harmful effects on the environment.

ID - CR06749

Originally posted by ricokevin on 02 Apr 2007, 19:48.
Last edited by Abhishek009 on 08 Sep 2018, 23:17, edited 3 times in total.
Edited the question.
Manager
Joined: 20 Jun 2005
Posts: 108
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

Updated on: 02 Apr 2007, 21:59
3
1
I would take (A).
Black ants help to benefit public health through controlling rodent populations.

B - out of scope: birds
C- out of scope
D- out
E - out : pesticides

Originally posted by pi10t on 02 Apr 2007, 21:09.
Last edited by pi10t on 02 Apr 2007, 21:59, edited 1 time in total.
CEO
Joined: 07 Jul 2004
Posts: 3829
Location: Singapore
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

02 Apr 2007, 22:00
A is best. Since it doesn't attack other black ants other than loma ants, then there are still populations of blacks ants that keeps the rodent population in control.
Manager
Joined: 02 Sep 2006
Posts: 222
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

03 Apr 2007, 00:15
Answer A cus only loma ants cause harm to people and not the other kind of black ants.
Manager
Joined: 20 Nov 2006
Posts: 160
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

03 Apr 2007, 00:18
Even though the question is not that tough it is good to have easy ones in between to keep your confidence up, eh???

I too picked A.
Manager
Joined: 25 Sep 2015
Posts: 101
Location: United States
GMAT 1: 700 Q48 V37
GPA: 3.26
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

31 Jan 2016, 13:54
1
ricokevin wrote:
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.

Which of the following, if true, most strengthens the argument?

A. Ant flies do not attack black ants other than Loma ants.
B. Loma ants are less effective than many bird species in competing with rodents for seeds.
C. Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds.
D. The sting of Loma ants can also be fatal to rodents.
E. The use of pesticides to control Loma ants could have harmful effects on the environment.

B C D are wrong.
While A and E both strengthen, the conclusion is inferred from the premise that the planned introduction of ant flies benefits public health. Thus, a premise where ant flies is an advantage should be the correct answer. Eliminate E and answer is A.
Director
Joined: 04 Jun 2016
Posts: 557
GMAT 1: 750 Q49 V43
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

13 Jul 2016, 02:04
3

1) Rat causes disease to human ===> Rats are bad for humans
2) Ant control rat population ===> Ant kills rat and helps humans to stay healthy. Ants are good for humans
3) But Loma Ant kills human ====> one type of ant Loma Ant is bad for humans.
4) Fly will kill Loma ant===> Loma ant will die = Human safe and healthy again

What if the fly kill all types of ant, then according to equation 2 rat population will increase==> when rat population increase then according to equation 1 human get disease.

So how can we strenghten the fact that flies would be good for humans?

Option A says that flies will kill only loma ant but not other ants.

This options doubly strengthen the argument:-
HUMANS will not die of loma ant poison
Other ant population will not decrease and these ant will keep killing rats, (so human will not get disease)

PERFECT CHOICE IS A

ricokevin wrote:
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.

Which of the following, if true, most strengthens the argument?

A. Ant flies do not attack black ants other than Loma ants.
B. Loma ants are less effective than many bird species in competing with rodents for seeds.
C. Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds.
D. The sting of Loma ants can also be fatal to rodents.
E. The use of pesticides to control Loma ants could have harmful effects on the environment.

_________________
Posting an answer without an explanation is "GOD COMPLEX". The world doesn't need any more gods. Please explain you answers properly.
FINAL GOODBYE :- 17th SEPTEMBER 2016. .. 16 March 2017 - I am back but for all purposes please consider me semi-retired.
Intern
Joined: 30 May 2016
Posts: 15
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

25 Jan 2017, 01:17
A is the answer. Very easy thinking.

Black ants also provide health benefit and should be protected.
Senior Manager
Joined: 03 Mar 2017
Posts: 367
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

25 Oct 2018, 01:27
Quote:
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of black ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.

The argument says that black ants compete with rodents for seeds and hence control rodent populations that poses a risk to humans.
Then it says that Loma Ant, a Blank Ant species, however is harmful to humans because of its venomous sting. To combat this, ant flies ,which prey on Loma ants, are introduced.

Conclusion:- Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.

Prethinking:-

Quote:
To strengthen, we have to see that

1. Wiping out Loma ants will not somehow impact rodents.
2. Ant flies are not preying on other black ants.

Which of the following, if true, most strengthens the argument?

Quote:
(A) Ant flies do not attack black ants other than Loma ants.

As per our prethinking Point2.

Quote:
(B) Loma ants are less effective than many bird species in competing with rodents for seeds.

No comparison of Loma ants and other bird species required here. Irrelevant

Quote:
(C) Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds.

If this is true, it is good to remove Loma Ants because they have venomous sting. Keep this

Quote:
(D) The sting of Loma ants can also be fatal to rodents.

But then it is equally fatal to humans. Out of scope.

Quote:
(E) The use of pesticides to control Loma ants could have harmful effects on the environment.

We are not using pesticides but an flies. Irrelevant.

Out of A and C, A matches our pre-thinking and is the winner.
_________________
--------------------------------------------------------------------------------------------------------------------------
All the Gods, All the Heavens, and All the Hells lie within you.
Manager
Joined: 12 Jul 2018
Posts: 63
Location: India
Schools: ISB '20, NUS '21
GMAT 1: 420 Q26 V13
GMAT 2: 540 Q44 V21
By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

04 Dec 2018, 00:49
My apologies if I am wrong:

But the OG book which I am referring has framed this question slightly different though the passage is exactly the same and the answer choices are also exactly the same with the OA being option A.

605. Which of the following most logically completes the argument?
By competing with rodents for seeds, black ants help control rodent populations
that pose a public health risk. However, a very aggressive species of black ant, the
Loma ant, which has recently invaded a certain region, has a venomous sting that is
often fatal to humans. Therefore, the planned introduction into that region of ant
flies, which prey on Loma ants, would benefit public health, since ________.
_________________
Please press +1 Kudos to support
Keep your eyes on the prize: 750
Intern
Joined: 05 Jul 2018
Posts: 19
Re: By competing with rodents for seeds, black ants help control  [#permalink]

### Show Tags

28 Sep 2019, 06:41
Hello GMATNinja GMATNinjaTwo

Need help regarding this question.

In this question, conclusion is that it would be beneficial for public health if ant flies are introduced and they kill the Loma ants.

How is it assumed from the premise, that ant flies may attack other ant species also when the conclusion explicitly states only Loma ants ? OA depends on this assumption.

If the premise clearly states that LA is the one that will be affected why do we need to see other ant species

Option C states that if LA are wiped out by ant flies, the Rodent population would still be under control since the other ants would still keep the rodents under control. If I consider it true that only LA are affected by rodent, I would get this answer.
Re: By competing with rodents for seeds, black ants help control   [#permalink] 28 Sep 2019, 06:41
Display posts from previous: Sort by