Question

Is the outer layer branch of a tree different from the outer layer of young stem ?why?

Answer 1

The outer layer of a plant is a very rough surfaces known as bark which consist of dead cells

The outer layer of stems is not that hard compared to bark and it's made up of living cells.





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Answer 2

Yup outer layer is made up of dead epithelium cells and is young plants they are living.
Also have lenticels for gaseous exchange and young plants have stomata