Xylem vessels and phloem companion cells are | vedclass

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(B) Xylem vessels are characteristic features of angiosperms. They are generally absent in pteridophytes and gymnosperms (with a few exceptions like $

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Ferns and gymnosperms

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(B) Xylem vessels are characteristic features of angiosperms. They are generally absent in pteridophytes and gymnosperms (with a few exceptions like $Ephedra$,$Gnetum$,$Selaginella$,and $Pteridium$).Companion cells are specialized parenchyma cells associated with sieve tubes in the phloem of angiosperms. They are absent in pteridophytes and gymnosperms,which instead possess albuminous cells.

Xylem vessels and phloem companion cells are generally absent in

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