Vessel less angiosperms are
Hydrilla
Trochodendron
Tetracentron
All the above
(d) They all are exception of angiosperms regarding presence of vessels.
The companion cells are specialized …….. which are closely associated with sieve tube elements.
Lignified cell wall is the characteristic feature of
Companion cells are usually seen associated with
Write a note on Augmentative tissue.
Lignin is the main constituent of
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