OG12 第21题。。求高手~~~谢谢大家啦~~~

安吉拉丁白痴痴

21. 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.



作者的观点是鸟的筑巢的本领不是天生的而是后天学习的对么？所以说小鸟看着老鸟筑巢就算后天学习呗？但是我总觉得如果说同一个地区的鸟筑的巢的样子很像是不是也可以起到加强的作用呢？所以我想问问A是什么意思？总觉得A有点像我说的那种情况似的。。谢谢大家啦~~~

clumsy123

" 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." Actually, even if the birds in the same place show the same bower-building styles, we can't conclude that the bower-building styles are culturally acquired. Because we don't know the kinds of birds in that place. What if the birds in that place are the same species? If so, we cannot tell whether the common  characteristics of the bower-building styles are culturally acquired or genetically transmitted.

解释的有点别扭。。。。

lalapiao

如果是同一地区的所有不同种类鸟儿筑巢的共同点多于不同点，可以说明是学来的。
而A中所指明同一地区的bowerbird-并没有指明当地有几种bowerbird。
若同一地区为相同种类的鸟儿（这是我的假设也是一般情况），在这种情况下无法得知是基因产生还是后天学来的。
看了lz的话再看题完全被绕进去了。。。

miffyflysky

一个地区style很像的话  
可以推出是cultural氛围引起的
也可以推出是基因传导的
无法判断

所以不能选A