The histogens are classified on the basis of
Cells they contain
Cells they give rise to future tissue
Meristematic activity
Cell division
Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel, which partially or completely blocks the cavity are present in
Knots in stems are formed due to
Vessels are absent in this angiosperm.
Grafting is successful in dicots but not in monocots because the dicots have
The cork cambium, cork and secondary cortex are collectively called