The vessel elements of angiosperms differ from other elements of xylem in having

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.

$A$ vascular bundle is considered closed when:

Phloem parenchyma is absent in

The ground tissue system includes ...............

Lignin is an important constituent in the cell wall of