Cells of meristematic tissue are ........

Vascular cambium and cork cambium are examples of

In how many planes does the tunica divide?

$A$: Intercalary meristems are commonly located at the base of leaves,above the nodes,or below the nodes.
$R$: Vacuoles are large-sized in the cells of intercalary meristem.

Plant growth in length is increased by

Histogen theory was proposed by