GWD 28-14

rosebudxiaojie

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 (Line 15) 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 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

E

WHY NOT A?

不知不觉

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.

文章好象没提到mating behavior, 只说了吸引和选择什么的,所以MALE只是展示自己身体健康, 品种优良啥的, 是FEMALE选择时候的不二之选

angela84

我也好想知道.....有哪位仁兄知道吗?

titatita

以下是引用rosebudxiaojie在2005-11-17 22:08:00的发言：

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 (Line 15) 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 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

E

WHY NOT A?

此题是suggest也就是不是从文章中明确提出的,而是通过文章中推出,文章提到brighter color的地方我用了粗体.选伴侣的时候,选brighter的说明brighter的是male中更好的,也就是fitness as a mate.是mate中的帅哥.而a文章没提到

klhyy

再把这道题目翻出来，希望NN能指点迷津

我的问题：

1.这道题目定位定在哪里

2.A错在哪