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Ecologist: One theory attributes the ability of sea butterflies

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Ecologist: One theory attributes the ability of sea butterflies [#permalink]

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New post 23 Mar 2017, 05:47
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54% (01:32) correct 46% (01:54) wrong based on 184 sessions

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Ecologist: One theory attributes the ability of sea butterflies to avoid predation to their appearance, while another attributes this ability to various chemical compounds they produce. Recently we added each of the compounds to food pellets, one compound per pellet. Predators ate the pellets no matter which one of the compounds was present. Thus the compounds the sea butterflies produce are not responsible for their ability to avoid predation.

The reasoning in the ecologist’s argument is flawed in that the argument


(A) presumes, without providing justification, that the two theories are incompatible with each other

(B) draws a conclusion about a cause on the basis of nothing more than a statistical correlation

(C) treats a condition sufficient for sea butterflies’ ability to avoid predators as a condition required for this ability

(D) infers, from the claim that no individual member of a set has a certain effect, that the set as a whole does not have that effect

(E) draws a conclusion that merely restates material present in one or more of its premises

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[Reveal] Spoiler: OA

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Re: Ecologist: One theory attributes the ability of sea butterflies [#permalink]

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New post 29 Mar 2017, 21:57
Option D -

the compounds together would have had a strong effect than considered individually. D points out that flaw.

Would like to know a strong reason to eliminate B? As per the stem, the author has not given any statistical correlation. So B is not very accurate; however, it draws our attention to the cause <--> effect funda.

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Ecologist: One theory attributes the ability of sea butterflies [#permalink]

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New post 29 Mar 2017, 23:20
warriorguy wrote:
Option D -

the compounds together would have had a strong effect than considered individually. D points out that flaw.

Would like to know a strong reason to eliminate B? As per the stem, the author has not given any statistical correlation. So B is not very accurate; however, it draws our attention to the cause <--> effect funda.


I think B is not right because of the word statistical correlation.It does not states anything about a correlation.It only provides a general example or experiment with the predators.And I don't think B presents a strong cause either.Its bounded in the statistics statement.In fact I think C is more tempting than B.But choice C is eliminated because its out of the scope.

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Re: Ecologist: One theory attributes the ability of sea butterflies [#permalink]

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New post 19 Jul 2017, 22:00
warriorguy wrote:
Option D -

the compounds together would have had a strong effect than considered individually. D points out that flaw.

Would like to know a strong reason to eliminate B? As per the stem, the author has not given any statistical correlation. So B is not very accurate; however, it draws our attention to the cause <--> effect funda.

Can someone explain how D is the answer?

There is some compound being produced by butterflies. And, that compound is tested by putting on each pellet. What is the difference between an individual compound and combined compound?

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Re: Ecologist: One theory attributes the ability of sea butterflies [#permalink]

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New post 19 Jul 2017, 22:16
yes C is a tempting trap
I go with D as it directly shows the flaw in the conclusion assumed by splitting the compounds and experimenting whereas C deals with the assumption part of the theory 'while another attributes this ability to various chemical compounds they produce'
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Re: Ecologist: One theory attributes the ability of sea butterflies [#permalink]

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New post 12 Aug 2017, 08:44
akshata19 wrote:
yes C is a tempting trap
I go with D as it directly shows the flaw in the conclusion assumed by splitting the compounds and experimenting whereas C deals with the assumption part of the theory 'while another attributes this ability to various chemical compounds they produce'



Can you explain what the option C means?
Thanks!

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Re: Ecologist: One theory attributes the ability of sea butterflies   [#permalink] 12 Aug 2017, 08:44
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