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  1. ... by extinction,the population may fall below a minimum whereby the forced interbreeding between the remaining animals will result in extinction. P.S . 這篇文章解釋很清楚,應該都回答了你...

    分類:科學 > 生物學 2005年05月29日

  2. ...movement of set of alleles from one place to another. 2006-03-19 03:58:38 補充: In conclusion, these different forces you mention are not all acting in the same direction. But they all...

    分類:科學 > 生物學 2006年03月18日