vestigial structure
(evolutionary theory) A structure in an organism that has lost all or most of its original function in the course of evolution, such as human appendixes.
A person who breeds horses.
plural of enforcement
Alternative form of wurst
クジラの骨盤の骨は、かつて陸上で暮らしていた祖先をうかがわせる痕跡器官です。
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