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题库 / Prep2007E1-CR-37
Capuchin monkeys in Venezuela often rub a certain type of millipede into their fur. Secretions of these millipedes have been shown to contain two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate the capuchins. The rubbing behavior is rare except during the rainy season, when mosquito populations are at their peak. Therefore, the monkeys probably rub the millipedes into their fur because doing so helps protect them against mosquitoes.
Which of the following would it be most useful to determine in order to evaluate the argument?
Whether the two chemicals provide any protection for the millipedes against their own predators
Whether the type of millipede used by the capuchin monkeys in Venezuela is found in other parts of the world
Whether animals other than capuchins rub insects of any kind into their fur
Whether the only time the millipedes are readily available to the capuchins is during the rainy season
Whether secretions of any other insects accessible to the capuchins contain chemicals that repel mosquitoes
P：猴子会把millipede揉搓进毛发里面，这种物质包含了驱蚊子的成分。这种揉搓的行为很少发生除了在雨季-蚊子数量达到峰值的时候
C：猴子揉搓的行为是为了驱散蚊子
choice D：是否millipedes对于猴子来说唯一可得的时候就是在雨季。如果否，那就说明猴子明明可以一年到头都rub,但是事实上只选在雨季这么做。增强了揉搓M和驱蚊的相关性。
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