还没有登录哦！
[Reading Comprehension]
试题详情
文章：
| Line | 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 | |
| (5) | 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 | |
| (10) | 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 | |
| (15) | 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 | |
| (20) | 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 | |
| (25) | 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. |
题目：
The passage implies which of the following about the insects from which animals acquire carotenoids?
选项:
A、They do not produce carotenoids themselves.
B、They use carotenoids primarily for coloration.
C、They maintain constant levels of carotenoids in their tissues.
D、They are unable to use carotenoids to boost their immune system.
E、They are available in greater abundance than are carotenoid-bearing plants.
答案:
A
提问：
想请张慧雯老师解答一下这一题。我选了D
解答：
点赞1
阅读151
提问：
想请张慧雯老师解答一下这一题。我选了D
解答：
点赞1
阅读152
问个问题
注册太麻烦？点这里查看免费答疑吧！
博币不足
加"GMAT小百科"小智微信
直接送200
