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Biologist: Lions and tigers are

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Biologist: Lions and tigers are  [#permalink]

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New post 29 Apr 2017, 05:44
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  75% (hard)

Question Stats:

58% (02:52) correct 42% (02:18) wrong based on 190 sessions

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Biologist: Lions and tigers are so similar to each other anatomically that their skeletons are virtually indistinguishable.But their behaviors are known to be quite different: tigers hunt only as solitary individuals,whereas lions hunt in packs.Thus,paleontologists cannot reasonably infer solely on the basis of skeletal anatomy that extinct predatory animals,such as certain dinosaurs,hunted in packs. The conclusion is properly drawn if which one of the following is assumed?

(A) The skeletons of lions and tigers are at least somewhat similar in structure in certain key respects to the skeletons of at least some extinct predatory animals.
(B) There have existed at least two species of extinct predatory dinosaurs that were so similar to each other that their skeletal anatomy is virtually indistinguishable.
(C) If skeletal anatomy alone is ever an inadequate basis for inferring a particular species’ hunting behavior,then it is never reasonable to infer,based on skeletal anatomy alone,that a species of animals hunted in packs.
(D) If any two animal species with virtually indistinguishable skeletal anatomy exhibit quite different hunting behaviors,then it is never reasonable to infer,based solely on the hunting behavior of those species,that the two species have the same skeletal anatomy.
(E) If it is unreasonable to infer,solely on the basis of differences in skeletal anatomy,that extinct animals of two distinct species differed in their hunting behavior,then the skeletal remains of those two species are virtually indistinguishable.
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Re: Biologist: Lions and tigers are  [#permalink]

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New post 30 Apr 2017, 02:06
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Wow! This one horrid question.
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Biologist: Lions and tigers are  [#permalink]

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New post 05 May 2017, 10:08
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aurobindomahanty wrote:
Biologist: Lions and tigers are so similar to each other anatomically that their skeletons are virtually indistinguishable.But their behaviors are known to be quite different: tigers hunt only as solitary individuals,whereas lions hunt in packs.Thus,paleontologists cannot reasonably infer solely on the basis of skeletal anatomy that extinct predatory animals,such as certain dinosaurs,hunted in packs. The conclusion is properly drawn if which one of the following is assumed?

(A) The skeletons of lions and tigers are at least somewhat similar in structure in certain key respects to the skeletons of at least some extinct predatory animals.
(B) There have existed at least two species of extinct predatory dinosaurs that were so similar to each other that their skeletal anatomy is virtually indistinguishable.
(C) If skeletal anatomy alone is ever an inadequate basis for inferring a particular species’ hunting behavior,then it is never reasonable to infer,based on skeletal anatomy alone,that a species of animals hunted in packs.
(D) If any two animal species with virtually indistinguishable skeletal anatomy exhibit quite different hunting behaviors,then it is never reasonable to infer,based solely on the hunting behavior of those species,that the two species have the same skeletal anatomy.
(E) If it is unreasonable to infer,solely on the basis of differences in skeletal anatomy,that extinct animals of two distinct species differed in their hunting behavior,then the skeletal remains of those two species are virtually indistinguishable.


IMO, the answer is (C).

It is given that the skeletons of lions and tigers are indistinguishable. But lions and tigers have one distinguishable feature which is their behaviour. Lions hunt in packs unlike tigers who hunt only as solitary individuals. Thus, we can infer that skeletal anatomy alone is not sufficient to infer a specie's hunting behaviour.
Now the conclusion is: Paleontologists cannot reasonably infer solely on the basis of skeletal anatomy that extinct predatory animals,such as certain dinosaurs,hunted in packs.
To come to this conclusion, we need an assumption which will connect the conclusion with something from the given arguments. That is, we need something without which the argument will fall apart. Only option (C) supports this, as it connects the conclusion with our inference. (in bold). If we negate this option, then we wont be able to derive the conclusion.

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Biologist: Lions and tigers are &nbs [#permalink] 05 May 2017, 10:08
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Biologist: Lions and tigers are

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