爱华网西博名师夏博士CR:
Male bowerbirds construct elaborately decoratednests, or bowers. Basing their judgmenton the fact that different local populations of bowerbirds of thesame species build bowers that exhibit different building anddecorative styles, researchers have concluded that the bowerbirds'building styles are a culturally acquired, rather than agenetically transmitted, trait.
Which of the following, if true, would moststrengthen the conclusion drawn by the researchers?
(A) There are more common characteristics thanthere are differences among the bowerbuilding styles of the localbowerbird population that has been studied mostextensively.
(B) Young male bowerbirds are inept atbowerbuilding and apparently spend years watching their eldersbefore becoming accomplished in the local bowerstyle.
(C) The bowers of one species of bowerbird lackthe towers and ornamentation characteristic of the bowers of mostother species of bowerbird.
(D) Bowerbirds are found only in New Guinea andAustralia, where local populations of the birds apparently seldomhave contact with one another.
(E) It is well known that the song dialects ofsome songbirds are learned rather than transmittedgenetically.
解析：
同一品种，不同地区的鸟儿造的鸟巢样子不一样，研究人员认为这说明鸟儿的造鸟巢技能是后天习得的，而不是通过基因传递的。一下哪个可以加强结论？
A认为鸟儿造的鸟巢的共性大于异质性。怎么看怎么都是和原来的证据对着干，焉能加强？
B认为年轻的鸟在熟练筑巢前是看着老鸟学习的，加强了后天学习的结论。
C讲的是这种品种的鸟和其他品种鸟的区别，和结论无关。
D选项说鸟儿不可能相互有接触，就削弱了他们后天习得的可能性，削弱了，非加强。
E讲的是鸟儿唱歌的情况如何如何，原结论关心的是鸟儿筑巢如何如何，无关，排除。
答案选B
