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cutebella

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?

1. A single millipede often gets passed around among several capuchins, all of whom rub their bodies with it.
   
   
2. The two chemicals that repel mosquitoes also repel several other varieties of insects.
   
   
3. The capuchins rarely rub their bodies with the millipedes except during the rainy season, when mosquito populations are at their peak.
   
   
4. Although the capuchins eat several species of insects, they do not eat the type of millipede they use to rub their bodies.
   
   
5. The two insect-repelling chemicals in the secretions of the millipedes are carcinogenic for humans but do not appear to be carcinogenic for capuchins.
   
   
   貌似除了C其他不是很对 可是C为啥对捏
   
   

cutebella

呃。。。 不点。。。

bonnie0715

那平常有蚊子（没达到peak但也可能挺多的呀）猴子却不抓？ 那怎么防蚊子。。

-- by 会员 cutebella (2010/5/21 0:13:13)

中秋的时候也有少量蚊子，请问楼主，您点蚊香么

cutebella

 好解释！  谢谢~~

mousealpha

好问题。。不过这个问题似乎没有答案能回答。。-_-"

只能说c是最能支持的答案。。

cutebella

那平常有蚊子（没达到peak但也可能挺多的呀）猴子却不抓？ 那怎么防蚊子。。

mousealpha

原文结论是猴子用millipedes防蚊子。。那就找跟猴子和蚊子有关的。。
a。猴子都擦millipedes。。不说明问题。。
b。两种化学物质能驱蚊，也能驱别的虫子。。这个应该是后半句无关了。。
c。只有在雨季猴子才擦millipedes，因为蚊子多。。只有这个暗示了猴子防蚊子的概念。。
d。猴子不吃millipedes。。这就没关系了。。
e。化学物质对人致癌，对猴子不致癌。。这显然也无关。。
所以。。c。。