Cork cambium is otherwise called:

$A$: Bark is all the tissues outside the vascular cambium.
$R$: Bark is formed due to the activity of phellogen only.

Lenticel develops through the activity of

In old dicot stems,a major part of the wood is filled up with tannins,resins,gums,etc. This part of the wood is called:

The trees growing in the desert will:

Complete the following analogy-type questions:
$(i)$ Wood formed during spring season : Early wood :: Wood formed during winter season : .........
$(ii)$ Bark formed early in the season : Early bark :: Bark formed at the end of the season : ..........