Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种
化是缓慢的，但不是
同样的
化--一些如海豆芽一样的生物从
早的化石来未发生改。
Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种化是缓慢的，但不是同样的化--一些如海豆芽一样的生物从早的化石来未发生改。
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