og 66题 - ChaseDream - Powered by Discuz!

66. 因为在讨论汇总中没有看到这个讨论,也没有搜索到,所以向各位nn请教

Male bowerbirds construct elaborately decorated nests, or bowers. Basing their judgment on the fact that different local populations of bowerbirds of the same species build bowers that exhibit different building and decorative styles, researchers have concluded that the bowerbirds’ building styles are a culturally acquired, rather than a genetically transmitted, trait.

Which of the following, if true, would most strengthen the conclusion drawn by the researchers?

(A) There are more common characteristics than there are differences among the bower-building styles of the local bowerbird population that has been studied most extensively

(B) Young male bowerbirds are inept at bower-building and apparently spend years watching their elders before becoming accomplished in the local bower style.

(C) The bowers of one species of bowerbird lack the towers and ornamentation characteristic of the bowers of most other species of bowerbird.

(D) Bowerbirds are found only in New Guinea and Australia, where local populations of the birds apparently seldom have contact with one another.

(E) It is well known that the song dialects of some songbirds are learned rather than transmitted genetically.

The information in choice B says that young bowerbirds progress slowly toward mastery of a bower-building style, which suggests that the skill is one they must learn, rather than one whose transmission is wholly genetic. Choice B also suggests a means of cultural transmission, namely, observation of older birds’ technique. Thus, B supports the conclusion and is the best answer.

That differences within building styles are outnumbered by similarities (choice A) and that local populations have little contact (choice D) are both equally consistent with building-style differences being culturally acquired or genetically transmitted. Nor are differences among species of bowerbird (choice C) the issue. Finally, choice E confirms the possibility of birds leaning skills, but it is not evidence that bower-building styles are learned.

答案D是说当地得鸟儿互相不见面, 既然不见面,所以窝得风格一样,不正式说明是genteically transmitted吗,可是ETS为什么说,D 有可能和culturally acquired or genetically transmitted 都相关呢?

请指教

文中说风格不一样啊! (exhibit different building and decorative styles). 不见面+ 风格不一样, 不能证明是culturally acquired还是genetically transmitted.

以下是引用cynthiasong在2007-6-24 1:40:00的发言：

看来大家版本不同

我看的11版 66题不是这个啊

原文的观点是鸟儿不是因为基因相同而建一样的东西，而是因为后期的教育和学习CULTURALLY ACQUIRED

D 说那些鸟很少接触，那大部分就是因为基因了啊，就和原文的观点不是很支持了，原文说不是基因，而是后期学习