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OG_VPR # 16 Biologists agree that snakes descended from liza

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OG_VPR # 16 Biologists agree that snakes descended from liza [#permalink] New post 12 Oct 2016, 06:46
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Question Stats:

75% (00:15) correct 25% (01:09) wrong based on 16 sessions
Biologists agree that snakes descended from lizards, but exactly where this first happened has been a matter of debate since the 1800s, when two _______ theories emerged.

A)complex

B) competing

C) dubious

D) conclusive

E) contending

F) irrefutable

[Reveal] Spoiler: OA
B and E


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Question: 16
Page: 129
[Reveal] Spoiler: OA

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Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 5158
Followers: 77

Kudos [?]: 1033 [0], given: 4648

CAT Tests
Re: OG_VPR # 16 Biologists agree that snakes descended from liza [#permalink] New post 12 Oct 2016, 06:47
Expert's post
Explanation

The “but” that connects the two parts of the sentence indicates that the second part contrasts in some way with the first part. In this case, the contrast is between the biologists’ agreement on a central fact (snakes’ descent from lizards) and a disagreement over the details (which have long been a matter of debate). The words that best complete the blank, then, must somehow emphasize this disagreement. Of the choices, “competing” and “contending” best do so because they imply that the two theories are what the long-running debate has centered upon. Of the other choices, “conclusive” and “irrefutable” are roughly synonymous, but neither suggests a matter worthy of a long-running debate. “Dubious,” in addition to having no near-synonym among the choices, would also not explain why the emergence of the two theories triggered the debate. While “complex” might well describe a theory, it too has no obvious pair among the choices, and it also does not foreground biologists’ disagreement regarding the two theories. Thus the correct answer is competing (Choice B) and contending (Choice E).
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Re: OG_VPR # 16 Biologists agree that snakes descended from liza   [#permalink] 12 Oct 2016, 06:47
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OG_VPR # 16 Biologists agree that snakes descended from liza

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