In terms of anatomy,a mature dicot root is distinguished from a dicot stem by the presence of:

When roots or stems are $..........$, annular and spiral thickenings develop in the protoxylem vessels.

$A$ major characteristic of the monocot root is the presence of

Hypodermis is not found in $ - $

Complete the analogy:
Tissue between xylem and phloem : Conjunctive tissue :: Tissue present inside the endodermis : .............

$(i)$ Unicellular hair
$(ii)$ Endodermis with passage cells
$(iii)$ Pith$-$small$/$inconspicuous
$(iv)$ Radial vascular bundle
$(v)$ Xylem exarch
$(vi)$ $2-4$ xylem and phloem
The above description refers to which of the following?