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该题平均耗时:1m24s,平均正确率:34.5% 添加做题笔记

Carotenoids, a family of natural pigments, form an important part 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.

【OG19-P384-444题】The idea that carotenoid-based coloration is significant partly because carotenoids are required for health suggests that a lack of bright coloration in a male is most likely to indicate which of the following?

  • 分析A选项
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  • 分析B选项
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  • 分析C选项
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  • 分析D选项
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  • 分析E选项
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    1123

    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.就相当于是身体好的雄性就有多余的类胡萝卜素去展示他们的色彩,而身体不好的雄性就只能用类胡萝卜素去“治病”,即他们是low genetic resistance to disease(risistance 抵抗力)。
    8楼  | 2018-10-22 17:02:06 回复
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      UomoVitruviano: 厉害了

      2018-10-30 21:28:52 回复

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    Crystal10

    这道题目容易错选A,关键是要弄清楚 a lack of bright coloration并不是lack of carotenoid,这是两个不同的概念。看完文章后从文章靠后部分可知,carotenoid可以用来coloration或者用来 boost immune system,所以本题是一个推断题,问缺少 coloration的话,可能会有其他什么特征? 那就可以合理推测是免疫系统不好,要去用来boost immune system了,答案从文中最后一句话可以看出来
    7楼  | 2018-10-08 11:19:12 回复
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    冲鸭冲鸭冲鸭

    A错在哪里还是不清楚
    6楼  | 2018-10-03 12:18:22 回复
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    盐饮

    定位在最后一句,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. 其中的逻辑是:genetical resistance 不好或者缺乏--要用更多的C for fighting disease--a lack of coloration
    5楼  | 2018-09-30 11:08:43 回复
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    shadowwww

    可能不是解毒过程有不有效?而是体质弱的需要解毒,就算体质弱的解毒是可能好的,只不过需要解很多的毒因为比较难以抵抗毒侵入?哎。。。
    4楼  | 2018-08-10 18:52:15 回复
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    必定770

    原文有这么一句: Males that are more susceptible to disease and parasites will have to use their carotenoids to boost their immune systems, 这些更容易生病或者感染寄生虫的males会用它们的 carotenoids来 boost 它们的免疫系统,那说明免疫系统不好,我错选了B,是不是B 不完整呢?没有提到disease这个方面
    3楼  | 2018-08-08 09:11:55 回复
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    Prince750

    前文说the presence of carotenoids, as signaled by coloration......
    就是carotenoid能通过coloration的方式来体现。
    It may be that males can use scarce carotenoids either for immune defense and detoxification or for attracting females.
    male有了carotenoids之后有两种选择(注意either...or...的结构)一种是增强免疫力或解毒,另一种是吸引异性。
    题目问缺少coloration的male意味着什么?
    顺着逻辑推,假设得到了相同量的carotenoid,体质弱的就会用绝大部分来增强体质,那用来color的就少;体质强的几乎不需要carotenoid继续增强体质,而是把绝大部分用来color。
    也就是说color少的一定是E选项的low genetic resistance to disease 
    A B 都无法确定 因为不知道carotenoids够不够immune defense and detoxification
    2楼  | 2018-08-07 10:37:52 回复
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    qq

    正确答案是C不是A, 猜测是因为C涵盖的比较完整。 文中的意思是说用于增强免疫,解毒来保持健康。 暗含的意思是抵抗病毒
    
    they are used by the immune system and for detoxification processes that are important for maintaining health
    1楼  | 2018-07-16 22:04:04 回复
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