[問卦] 哺乳類牙齒為什麼不能無限再生?
如題
看看隔壁蜥形類的,牙齒可以一直長、一直長
壞了就再長一顆新的出來,多方便,直接讓牙科醫生失業!
反觀哺乳類,牙齒一輩子就只能長兩次,用完就沒了,真是豈有此理!
我懷疑這是牙醫的陰謀!
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