题目信息

Carotenoids, a family of natural pigments, form an important art of the colorful signals used by many animals. Animals acquire carotenoids either directly (from the plants and algae that produce them) or indirectly (by eating insects) and store them in a variety of tissues. Studies of several animal species have shown that when choosing mates, females prefer males with brighter carotenoid-based coloration. Owens and Olson hypothesize that the presence of carotenoids, as signaled by coloration, would be meaningful in the context of mate selection if carotenoids were either rare or required for health. The conventional view is that carotenoids are meaningful because they are rare: healthier males can forage for more of the pigments than can their inferior counterparts. Although this may be true, there is growing evidence that carotenoids are meaningful also because they are required: they are used by the immune system and for detoxification processes that are important for maintaining health. It may be that males can use scarce carotenoids either for immune defense and detoxification or for attracting females. Males that are more susceptible to disease and parasites will have to use their carotenoids to boost their immune systems, whereas males that are genetically resistant will use fewer carotenoids for fighting disease and will advertise this by using the pigments for flashy display instead.

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  • Information in the passage suggests that which of the following is true of carotenoids that a male animal uses for detoxification processes?

    A:They were not acquired directly from plants and algae.
    B:They cannot be replenished through foraging.
    C:They cannot be used simultaneously to brighten coloration.
    D:They do not affect the animal's susceptibility to parasites.
    E:They increase the chances that the animal will be selected as a mate.
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    共享解析来源为网络权威资源、GMAT高分考生等; 如有疑问,欢迎在评论区提问与讨论
    正确答案: C:They cannot be used simultaneously to brighten coloration.

    题目类型:inference

    选项分析:

    根据文中的信息,可以判断出关于雄性物种使用carotenoids来消毒的有关说法哪个是正确的?

    定位“whereas males that are genetically resistant will use fewer carotenoids for fighting disease and will advertise this by using the pigments for flashy display instead“,就是说如果用pigment来消毒的话,就没有pigment用来装饰自己展现颜色了,这就是选择C

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