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Advertisement: Attention pond owners! Ninety-eight percent of mosquito

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Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 22 Feb 2017, 18:40
1
8
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

72% (01:23) correct 28% (01:19) wrong based on 326 sessions

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Advertisement: Attention pond owners! Ninety-eight percent of mosquito larvae in a pond die within minutes after the pond has been treated with BTI. Yet BTI is not toxic to fish, birds, animals, plants, or beneficial insects. So by using BTI regularly to destroy their larvae, you can greatly reduce populations of pesky mosquitoes that hatch in your pond, and you can do so without diminishing the populations of fish,frogs, or beneficial insects in and around the pond.

Which one of the following is an assumption on which the argument depends?

(A) The most effective way to control the numbers of mosquitoes in a given area is to destroy the mosquito larvae in that area.

(B) Populations of mosquitoes are not dependent on a single body of water within an area as a place foe their larvae to hatch and develop

(C) There are no insect pests besides mosquitoes that pond owners might want to eliminate from in and around their pond.

(D) The effectiveness of BTI in destroying mosquito larvae In a pond does not require the pond owner’s strict adherence to specific application procedures.

(E) The fish, frogs, and beneficial insects in and around a pond-owner’s pond do not depend on mosquito larvae as an important source of food.

Source: LSAT
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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 22 Feb 2017, 23:14
Hi,

How come "A" is not the correct answer?

I believe that the population of mosquitoes can be curtailed by only limiting the population of larvae in the area.
As the stimulus mentioned that 98%(Almost all) of the larvae can be destroyed by BTI, therefore,the evident assumption is that the population of mosquitoes can be most effectively controlled by limiting the population of the larvae.

Moreover, for option"E", we are not concerned with the food or prey of fishes,frogs and insects. All we are concerned(majorly) with is the population of the insect.

Comparing "A" and "E", in my reckoning, "A" is a more valid and solid assumption.

Please point out the flaw in the reasoning
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Honneeey.

In former years,Used to run for "Likes", nowadays, craving for "Kudos". :D

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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 23 Feb 2017, 10:16
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(A) The most effective way to control the numbers of mosquitoes in a given area is to destroy the mosquito larvae in that area. -->incorrect --> argument talks about killing mosquitoes without affecting other species and negating this statement doesn't make any sense
(B) Populations of mosquitoes are not dependent on a single body of water within an area as a place foe their larvae to hatch and develop
(C) There are no insect pests besides mosquitoes that pond owners might want to eliminate from in and around their pond.
(D) The effectiveness of BTI in destroying mosquito larvae In a pond does not require the pond owner’s strict adherence to specific application procedures.
(E) The fish, frogs, and beneficial insects in and around a pond-owner’s pond do not depend on mosquito larvae as an important source of food ---> Correct --> if fish frogs and other beneficial insects depends on the larvae, then destroying the larvae will impact these.
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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 23 Feb 2017, 10:27
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honneeey wrote:
Hi,

How come "A" is not the correct answer?

I believe that the population of mosquitoes can be curtailed by only limiting the population of larvae in the area.
As the stimulus mentioned that 98%(Almost all) of the larvae can be destroyed by BTI, therefore,the evident assumption is that the population of mosquitoes can be most effectively controlled by limiting the population of the larvae.

Moreover, for option"E", we are not concerned with the food or prey of fishes,frogs and insects. All we are concerned(majorly) with is the population of the insect.

Comparing "A" and "E", in my reckoning, "A" is a more valid and solid assumption.

Please point out the flaw in the reasoning


I think you have reversed the logic flow. Option A may be an inference from the conclusion of the passage, i.e. option A FOLLOWS FROM the conclusion. However an assumption should LEAD TO the conclusion. Thus A is not an assumption, but could be an inference.
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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 24 Feb 2017, 19:16
1
honneeey wrote:
Hi,

How come "A" is not the correct answer?

I believe that the population of mosquitoes can be curtailed by only limiting the population of larvae in the area.
As the stimulus mentioned that 98%(Almost all) of the larvae can be destroyed by BTI, therefore,the evident assumption is that the population of mosquitoes can be most effectively controlled by limiting the population of the larvae.

Moreover, for option"E", we are not concerned with the food or prey of fishes,frogs and insects. All we are concerned(majorly) with is the population of the insect.

Comparing "A" and "E", in my reckoning, "A" is a more valid and solid assumption.

Please point out the flaw in the reasoning


Option A is not an assumption here. It can be the MOST effective way to destroy mosquitoes or the LEAST effective way or just a GOOD way. Argument does not depend on this.
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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 13 Mar 2017, 02:49
An assumption is a must be true option to hold the conclusion true. The most effective way to control the numbers of mosquitoes in a given area is to destroy the mosquito larvae in that area. To destroy mosquito larvae it need not to be the most effective. There might be other effective ways but we are not concerned with those. They are out of scope. If the current plane is effective then it is enough for us.

So, see that it is not a must be true and hence not an assumption.
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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 25 Mar 2017, 15:33
we need to find an answer that would connect two pieces: 1) Bti destroyes mosquitto 2) fish stays alive
E does the job, because of the wish to be dependent of mosquitos->then BTI would affect fish as well
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Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito [#permalink]

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New post 28 Mar 2017, 13:35
1
Advertisement: Attention pond owners! Ninety-eight percent of mosquito larvae in a pond die within minutes after the pond has been treated with BTI. Yet BTI is not toxic to fish, birds, animals, plants, or beneficial insects. So by using BTI regularly to destroy their larvae, you can greatly reduce populations of pesky mosquitoes that hatch in your pond, and you can do so without diminishing the populations of fish,frogs, or beneficial insects in and around the pond.

Which one of the following is an assumption on which the argument depends?

Assumption question ask to identify the link between the premise and the conclusion. here the premise is that the BTi kills mosquito larvae and the conclusion is that the BTi should be used to kill all the larvae in the pond.The assumption is that the peope do want to kill the larvae and it does not impact anything.

Negation Test. Hyposthis an opposite statement of the sorted statement and if it breaks the argument then it is the correct answer. for asuumption question.


(A) The most effective way to control the numbers of mosquitoes in a given area is to destroy the mosquito larvae in that area. The efferctivness is not the subject of the argument
(B) Populations of mosquitoes are not dependent on a single body of water within an area as a place foe their larvae to hatch and develop as the argument suggest that all the water bodies should be treated with BTI
(C) There are no insect pests besides mosquitoes that pond owners might want to eliminate from in and around their pond.Other insects are out of scope.
(D) The effectiveness of BTI in destroying mosquito larvae In a pond does not require the pond owner’s strict adherence to specific application procedures. out of scope for the assumption type question
(E) The fish, frogs, and beneficial insects in and around a pond-owner’s pond do not depend on mosquito larvae as an important source of food.Correct answer and passes the negation test.
Re: Advertisement: Attention pond owners! Ninety-eight percent of mosquito   [#permalink] 28 Mar 2017, 13:35
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