_____ are cells that lay the framework for new phloem and xylem in vascular plants. Prior to the differentiation of these cells, their precursors transported auxin out of immature leaves.

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The Answer of _____ are cells that lay the framework for new phloem and xylem in vascular plants. Prior to the differentiation of these cells, their precursors transported auxin out of immature leaves.

_____ Are Cells That Lay the Framework for New Phloem