The collective name for cork cambium and phelloderm is

Lenticel develops through the activity of

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: Late wood has fewer xylary elements with narrow vessels.
Reason $R$: Cambium is less active in winters.
In the light of the above statements,choose the correct answer from the options given below:

The light-colored outer region of the wood is known as ..........

What are the balloon-like structures known as tyloses?

Cork tissue arises from