Which one of the following is not part of the Epidermal tissue system?

Select correct features w.r.t. trichomes in the shoot system:
$(a)$ Usually unicellular
$(b)$ Branched or unbranched
$(c)$ May be secretory
$(d)$ Soft or stiff
$(e)$ Helps against transpiration

The primary function of lenticels is $..........$.

The chief function of vessels in the plant body is to:

Select the correct statements.
$I.$ Epidermal cells have a small amount of cytoplasm and a large vacuole.
$II.$ $A$ waxy layer,the cuticle,is absent in roots.
$III.$ Root hairs are unicellular,while stem hairs/trichomes are multicellular.
$IV.$ Trichomes are branched/unbranched,soft/stiff,and secretory or transpiration-preventive.
$V.$ Guard cells are dumb-bell-shaped in monocots (e.g.,grass) and bean-shaped in dicots.

Leaf mesophyll cells are included in $:-$