GWD28-Q14

messer · 发表于 2010-12-15 12:01:31

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.

14. GWD28-Q14:

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

A.Readiness for mating behavior

B.Ability to fight

C.Particular feeding preferences

D.Recovery from parasite infestation

E.Fitness as a mate

我选的A 答案是D 不明白啊 E的 Fitness 是指身体很好啊 Readiness 是指有准备，愿意的
文章的意见就是作者的意见在偏向的不是tranditional 呀怎么是这样哪位帮我解释下嘛

14. GWD28-Q14:

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

A.Readiness for mating behavior

B.Ability to fight

C.Particular feeding preferences

D.Recovery from parasite infestation

E.Fitness as a mate

我选的A 答案是D 不明白啊 E的 Fitness 是指身体很好啊 Readiness 是指有准备，愿意的
文章的意见就是作者的意见在偏向的不是tranditional 呀怎么是这样哪位帮我解释下嘛

jerryjay · 发表于 2010-12-17 18:11:24

when choosing mates, females prefer males with brighter carotenoid-based coloration.
所以根据这句话，说明females 倾向于male with brighter...
A是说male做好了交配的准备，所以E对。。

jay871750293 · 发表于 2012-4-17 20:36:12

想问一下D为什么不对呢？？？

文章最后一句：“ 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.”

我理解的意思是说：雄性如果免疫系统好的话，就不用花很多C在提高免疫系统上，而大多数C会用来渲染自己，而那些免疫低的雄性则相反，很多C花在提高免疫上，从而导致颜色不亮

所以，通过颜色可以判断免疫呀，那么D为什么错呢？？？

求解释呀！！！
谢谢！！！

海贝520 · 发表于 2016-1-21 11:07:47

jay871750293 发表于 2012-4-17 20:36
想问一下D为什么不对呢？？？文章最后一句：“ Males that are more susceptible to disease and parasites ...

D. Recovery from parasite infestation是从寄生虫感染中恢复，就是病了再恢复。
原文： 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.
这里说的是boost意思是更多的C被用来加强免疫系统来抵抗可能生的病，不是用C来恢复健康
后面的genetically resistant也说明的是抵抗获得疾病，不是从疾病中恢复

GWD28-Q14

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