Cambium is present in between
Phloem and xylem
Permanent mature cells
Collenchyma and sclerenchyma
Collenchyma and parenchyma
Duramen is present in
Plant tissues are divided into meristematic and permanent tissues on which of the following basis?
$A$ : Complementary cells are cut-off by phellogen towards outside.
$R$ : Phellogen is partially secondary in origin.
The histogens are classified on the basis