In this type of vascular bundle,xylem and phloem do not lie on the same radius.

Subsidiary cells are the specialised cells in the

Cystolith mineral crystals are found in:

Trichomes are.........

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.

Epidermal cells modify to form $:$