related because every species has descended from a common ancestor
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'''Universal common ancestry''' is the idea that all life on Earth is related, having descended from a common ancestor or ancestral gene pool. It is a tenet of the [[Theory of evolution]], and a belief rejected by [[Creationism]].
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'''Universal common ancestry''' is the idea that all life on Earth is related because every species has descended from a [[common ancestor]] or ancestral [[gene pool]]. It is a tenet of the [[Theory of evolution]], and a belief rejected by [[Creationism]].