Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种是缓慢,但不是同样速度--些如海豆芽样生物从最早未发生改。
Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为物种是缓慢,但不是同样速度--些如海豆芽样生物从最早未发生改。
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