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Capuchin monleys often rub their bodies with a certain type of millipede. Laboratory tests show that secretions fro the bodies of these millipedes are rich in the 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 sigle millipedes often gets passed around among several capuchins , all of whom rub their bodies with it. B The two chemicals that repel mosquitoes also repell 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 millipedess 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. | 
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发表于 2004-12-3 01:44:00
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