Term 'meristem' was coined by

A tissue with spiral thickening in the cell wall capable of absorbing water from air is known as

In a woody dicotyledonous tree, which of the following parts wall mainly consist of primary tissues

In a dicotyledonous stem, the sequence of tissues from the outside to the inside is

$A$ : Complementary cells are cut-off by phellogen towards outside.

$R$ : Phellogen is partially secondary in origin.

As compared to a dicot root, a monocot root has