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.
The passage suggests that relatively bright carotenoidbased coloration is a signal of which of the following characteristics in males of certain animal species?
Readiness for mating behavior
Ability to fight
Particular feeding preferences
Recovery from parasite infestation
Fitness as a mate
题目分析:
文章细节题:文章认为亮的雄性有什么特点?
选项分析:
A选项:愿意交配:没有提到。
B选项:战斗力爆表:没有提到。
C选项:特殊的进食偏好:没有提到。
D选项:从寄生虫感染中恢复出来:文章的新观点只是认为更亮的雄性更健康,基因更强大。
E选项:正确。合适的伴侣:原文写到雌性动物更喜欢亮的雄性。
D选项:从寄生虫感染中恢复出来:文章的新观点只是认为更亮的雄性更健康,基因更强大。
文中只提到“healthier”,没有提到“recovery”!(原文没有明确提到的内容尽量不选,这需要主观猜测补充)
E选项:正确。合适的伴侣:原文写到雌性动物更喜欢亮的雄性。
Fitness(n. 健康;适当;适合性) as a mate;fitness不管翻译成健康还是合适性都符合原文意思!
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