The companion cells are specialized ........ which are closely associated with sieve tube elements.
Collenchymatous cells.
Parenchymatous cells
Sclereids
Fibers
In parenchyma, thickening is of
Sieve tubes have
In pteridophyta and gymnosperms which cells are present in place of companion cell
Promeristems can be distinguished from primary meristems by
The phloem of angiosperms differs from that of other vascular plants by the presence of