The vascular system can be said to have been launched by a single evolutionary event. Sometime during the Paleozoic era (before 440 Mya), the sporophyte generation of a now long-extinct land plant produced a new cell type, the _______.

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The Answer of The vascular system can be said to have been launched by a single evolutionary event. Sometime during the Paleozoic era (before 440 Mya), the sporophyte generation of a now long-extinct land plant produced a new cell type, the _______.

The Vascular System Can Be Said to Have Been Launched