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Scientist: A small group of islands near Australia is inhabited

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Scientist: A small group of islands near Australia is inhabited [#permalink]

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Question Stats:

27% (01:41) correct 73% (01:43) wrong based on 150 sessions

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Scientist: A small group of islands near Australia is inhabited by several species of iguana; closely related species also exist in the Americas, but nowhere else. The islands in question formed Jong after the fragmentation of Gondwana, the ancient supercontinent that included present-day South America and Australia. Thus, these species' progenitors must have rafted on floating debris across the Pacific Ocean from the Americas.

Which one of the following, if true, most weakens the scientist's argument?

(A) A number of animal species that inhabit the islands are not found in the Americas.

(B) Genetic analysis indicates that the iguana species on the islands are different in several respects from those found in the Americas.

(C) Documented cases of iguanas rafting long distances between land masses are uncommon.

(D) Fossils of iguana species closely related to those that inhabit the islands have been found in Australia.

(E) The lineages of numerous plant and animal species found in Australia or in South America date back to a period prior to the fragmentation of Gondwana.

Source: LSAT PrepTest 80 - December 2016
[Reveal] Spoiler: OA

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Re: Scientist: A small group of islands near Australia is inhabited [#permalink]

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New post 12 Jul 2017, 01:06
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this is quite interesting to go through this argument .
see we have said that species of iguana fish inhabit near the islands of australia ,
conclusion : if we re-frame says that these species which currently inhabit near the islands of australia have moved from America that means they earlier inhabited in America , so we need to tell that they had not inhabited in America but in australia .

now go through the options
A. we do not care about other species or animals , wrong
B. A trap, but does not directly address the issue , out
C. irrelevant
D. yes, if fossils of iguana found in australia then these species which live near the islands of Austrlia must have come from australia not from somewhere else like America . so correct
E. totally out of scope talking about other plant and animals .

hence D
hit kudos if you liked my reasoning .

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Re: Scientist: A small group of islands near Australia is inhabited [#permalink]

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New post 22 Sep 2017, 17:51
E talks about lineages => out of scope with A and C.
B does not help.
Only D is left.

Kudos [?]: 11 [0], given: 859

Re: Scientist: A small group of islands near Australia is inhabited   [#permalink] 22 Sep 2017, 17:51
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Scientist: A small group of islands near Australia is inhabited

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