common descent

(redirected from Universal common ancestor)
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All life evolved from a single-celled universal common ancestor, and at various times in Earth history, single-celled organisms threw their lot in with each other to become larger and multicellular, resulting, for instance, in the riotous diversity of animals.
Washington, Oct 6 (ANI): The great-grandparent of all living things, dubbed the Last Universal Common Ancestor (LUCA), was a sophisticated organism after all, with a complex structure recognizable as a cell, researchers say.

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