What is the function of the hypodermis?

Vascular bundles surrounded by a sclerenchymatous bundle sheath is a feature of

Cut a transverse section of a young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.

Conjoint collateral closed vascular bundle 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.

What is the term for a stele that contains numerous scattered vascular bundles?