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OG18官方指南,建议同学们刷3遍。第一遍做题了解题型和考点,第二遍精刷,第三遍集中解决疑难问题。建议考生第一遍刷题采用官方正版纸质书籍,若遇到疑难问题,欢迎在此专区查阅解析,提供解析,参与题目讨论,与所有考生一起解决疑难问题。
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建议使用官方纸质指南,查看对照完整题目

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.

【OG20-P422-517题】

The passage suggests that relatively bright carotenoid-based coloration is a signal of which of the following characteristics in males of certain animal species?

  • 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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该题目由网友kirLKMO提供。更多GMAT题目请
暂无雷哥网文字解析
当前版本由 L_ring 更新于2018-09-12 15:06:20 感谢由 L_ring 对此题目的解答所做出的贡献。

根据题干可以定位到Studies of several animal species have shown that when choosing mates, females prefer males carotenoids with brighter carotenoid-based coloration.所以动物的颜色越鲜艳,就越容易被选作为配偶,E选项正确。

A选项,mating behavior 是交配行为,文章讨论的是作为配偶,而不是交配行为,排除。

B和C文章未提及。D选项,与文章内容不符,文章说的是免疫,使动物免受侵害,而选项却是遭到侵害之后的恢复,两者不一样。


题目讨论 5条评论)

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    郁小姐要上700吖

    定位:Studies of several animal species have shown that when choosing mates, females prefer males with brighter carotenoid- based coloration.
    fitness(适合)as mate=适合做伴侣
    0 0 回复 2020-04-08 14:55:38
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    杜一凡

    “The passage suggests”说明是找作者观点,文中介绍了两种观点。第一种传统观点被后面那种观点反驳,说明作者支持后面那种观点,后面的观点说的是health。
    0 0 回复 2019-07-30 09:16:47
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      杜一凡回复杜一凡

      文章前面的两个o人那里总结了色素有用的可能的两大原因,一个是rare,一个是required for health。这个题的其他选项都是细节,不全面,且有错误。

      0 0 回复 2019-07-30 09:20:15

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    UomoVitruviano

    我觉得D应该是不全面,defense(缺少)+ detoxification(recovery)=immune system 完善=fitness
    所以E比较好
    0 0 回复 2018-10-30 21:40:30
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    盐饮

    B fight后面缺少宾语,如果说是disease,那可能是对的;
    C 没有提及feeding preference
    D recovery不对,应是defend
    E正确
    0 0 回复 2018-09-30 11:14:04
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      小奶宝回复盐饮

      A呢

      0 0 回复 2019-05-10 17:48:19

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    blingblinglala

    D :Recovery恢复和文中的免疫系统不一样  免疫是还没有受到感染
    0 0 回复 2018-07-16 05:02:02
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      UomoVitruviano回复blingblinglala

      可是免疫应该包括defense和detoxification吧。所以应该有包括感染后的恢复啊

      0 0 回复 2018-10-30 21:37:47

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