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Vascular plants are thought to be the result of a single evolutionary event: the evolution of a wholly new cell type, the tracheid. This cell type:
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Vascular plants are thought to be the result of a single evolutionary event: the evolution of a wholly new cell type, the tracheid. This cell type:

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Answer:

Is the principal water-conducting element of the xylem in all vascular plants except the angiosperms.

Step-by-step explanation:

User Zareen
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