标题: 问一个36套的问题 [打印本页] 作者: gloryming 时间: 2012-12-3 09:21 标题: 问一个36套的问题 练习7中第11题 For the following question, consider each of the choices separately and select all that apply 11. The author would be most likely to agree with which of the following statements about left-eyedness and right-eyedness in the starry flounder? □A They are adaptive variations by the starry flounder to environmental differences. □B They do not seem to give obvious selective advantages to the starry flounder. □C They occur in different proportions in different locations. 为什么不选A 这不是有原话么？ Biologists call this kind of gradual variation over a certain geographic rang a ―cline‖ and interpret clines as strong indications that the variation is adaptive, a 20 response to environmental differences.求解释！作者: zkh1991 时间: 2012-12-3 19:04
你说的这句是 biologists的解释 后面作者也写了这些现象不能用adaptive很好的解释 所以肯定是不同意adaptive的说法的作者: gloryming 时间: 2012-12-7 09:08