FIRST APPEARANCE. “A life history involving alternation of two developmentally associated, multicellular generations (sporophyte and gametophyte) is an autapomorphy of embryophytes (bryophytes + vascular plants). Microfossil data indicate that Mid–Late Ordovician land plants possessed such a life cycle, and that the origin of alternation of generations preceded this date.” (450-475 My ago).
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linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022