Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为种变化是缓慢,但不是以同速度变化--些如海豆最早化石以来未发改变。
Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.
达尔文认为种变化是缓慢,但不是以同速度变化--些如海豆最早化石以来未发改变。
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