Question

state the difference between the tissue of outer layer of branch of a tree and a young tree stem

Answer 1

Young tree stem has meristematic tissue which temporary dividing living tissue.

The outer layer of branch has dead sclerenchymatous tissue for protection.

Not sure of second point.

Answer 2

the outer layer of branch is tough because of the presence of epidermis and cord cells whereas the young tree stem is soft due to the presence of meristemetic tissue.. and new one is also flexible