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# Capuchin monkeys often rub their bodies with a certain type

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Capuchin monkeys often rub their bodies with a certain type [#permalink]

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03 Aug 2008, 12:35
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Capuchin monkeys often rub their bodies with a certain type of millipede. Laboratory tests show that secretions from the bodies of these millipedes are rich in two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate capuchins. Some scientists hypothesize that the monkeys rub their bodies with the millipedes because doing so helps protect them from mosquitoes.
Which of the following, if true, provides the most support for the scientists’ hypothesis?
A. A single millipede often gets passed around among several capuchins, all of whom rub their bodies with it.
B. The two chemicals that repel mosquitoes also repel several other varieties of insects.
C. The capuchins rarely rub their bodies with the millipedes except during the rainy season, when mosquito populations are at their peak.
D. Although the capuchins eat several species of insects, they do not eat the type of millipede they use to rub their bodies.
E. The two insect-repelling chemicals in the secretions of the millipedes are carcinogenic for humans but do not appear to be carcinogenic for capuchins.

I went for C, however the OA is E and I do not agree with the OA
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04 Aug 2008, 14:29
E? Really?

I went with C.
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15 Aug 2008, 11:07
I also went with C. E seems awkward.
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16 Aug 2008, 01:42
C is the best. What is the source of the question?
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16 Aug 2008, 05:42
fiesta wrote:
C is the best. What is the source of the question?

I thought C was quite straight forward.

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18 Aug 2008, 16:37
This is GMATPrep question.
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18 Aug 2008, 23:34
No. In GMATPrep monkeys were same but not the question.
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19 Aug 2008, 01:31
E is wrong. All the question is about capuchin monkeys, not about humans. It is clear that the best answer is C becuase it gives the best support. What is the source of that question?
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19 Aug 2008, 01:36
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19 Aug 2008, 03:02
In the first go I also went for C. However, after seeing the answer, I have the following explanation in support of E.

Why do scientists hypothesize that rubbing their bodies with millipedes helps protect monlkeys from mosquitoes? That could be because the chemicals from the bodies of these millipedes are probably not harmful to monkeys and hence monkeys often rub their bodies with millipedes. Else, had these chemicals been harmful to monkeys, they would not have often rubbed their bodies.
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19 Aug 2008, 03:06
Also, C cannot be correct as it mentions that monkeys rarely rub their bodies except during the rainy seasion. This contradicts the first premise that mentions that Capuchin monkeys often rub their bodies......
Re: CR: Capuchin Monkeys   [#permalink] 19 Aug 2008, 03:06
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