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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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01 Aug 2009, 12:50
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88% (01:48) correct 13% (00:59) wrong based on 152 sessions

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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.
[Reveal] Spoiler: OA
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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01 Aug 2009, 13:22
ramiy wrote:
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 think the best answer is C. It supports the hypothesis more than any other choices. Am I right?
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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01 Aug 2009, 15:54
c no mosquito no rubing ....mosuito there is rubing
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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02 Aug 2009, 03:09
Boils down to C and D.. will go with C

when mosquito populations are at their peak---> monkeys rub their bodies with the millipedes because doing so helps protect them from mosquitoes ,else they don't.
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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02 Aug 2009, 04:21
C it is.
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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02 Aug 2009, 09:31
C for sure!
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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02 Aug 2009, 19:31
Question -

How would one negate D as an answer

Although the capuchins eat several species of insects, they do not eat the type of millipede they use to rub their bodies.

Is it ok to assume that the monkeys do not eat it due to other reasons ?
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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03 Aug 2009, 05:46
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D seems to be ambiguous to an extent while C is clear.

Monkeys might not eat lots of other species that doesnt mean they rub all of them for protection right? So it can be for any other reason.
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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05 Aug 2009, 09:24
1 more for C.

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

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05 Aug 2009, 17:41
C. The capuchins rarely rub their bodies with the millipedes except during the rainy season, when mosquito populations are at their peak.

C makes the connection of mosquito and millipedes, supports that millipedes are used to repel mosquitos
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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05 Aug 2009, 23:07
IMO C
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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06 Aug 2009, 01:05
The conclusion is, Monkeys rub their bodies with millipedes to protect themselves from mosquitoes. This is strengthened by the option C, which says that monkeys rub their bodies with millipedes mostly in rainy season.
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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06 Oct 2009, 15:14
C.

What is the OA?
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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06 Oct 2009, 15:29
Hi Ramiy,

I also support 'C'. Could you please post the OA?

Thx in appreciation.
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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07 Oct 2009, 06:42
Forall those who agree C as the answer...i l say that the hypothesis of scientist is only supported for rainy season...wt abt other seasons..??its a bit confusing...
also for D i l say that monkeys do not eat mosquitoes becoz they know tht it will protect them...so IMO D...
any comments ..OA pls
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Re: Capuchin monkeys often rub their bodies with a certain type [#permalink]

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29 Jan 2014, 00:06
I would go for C again since it supports the scientists hypotheses where he says that capuchin monkeys will rub themselves only to shoo off the mosquitoes.
OA Pls.
Re: Capuchin monkeys often rub their bodies with a certain type   [#permalink] 29 Jan 2014, 00:06
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