Conjoint collateral closed vascular bundle is found in

What is the function of the hypodermis?

In dicot stem,vascular bundles are

In which group of plants are bordered pits found in the xylem vessels?

Innumerable vascular bundles,lack of cambium and lack of a well demarcated pith is found in:

The transverse section of a plant shows the following anatomical features:
$(a)$ Large number of scattered vascular bundles surrounded by bundle sheath.
$(b)$ Large conspicuous parenchymatous ground tissue.
$(c)$ Vascular bundles conjoint and closed.
$(d)$ Phloem parenchyma absent.
Identify the category of plant and its part.