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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.
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这些差异在自然选择的过程中决定了遗传变异,而环境变化使得两足行走的猿人比起四足行走的猿人更有优势。
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