The histogens are classified on the basis of
Cells they contain
Cells they give rise to future tissue
Meristematic activity
Cell division
$I.$ Sunflower seed
$II.$ A wheat leaf
$III.$ Pea plant
$IV.$ Leaf blade of grass
Bulliform cells are present in which of the above plants?
Casparian strip is found in
Velamen is needed for
Tunica corpus theory is related with