What was true of the hypothesis of the research?A) Our apelike ancestors were anatomically different but had the same gaits.B) Bipeds with natural selection had an advantage over quadruped.

 
  • 這些差異在自然選擇的過(guò)程中決定了遺傳變異,而環(huán)境變化使得兩足行走的猿人比起四足行走的猿人更有優(yōu)勢。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan