Question

what changes do occur on the outer layer of a young stem when it becomes a tree

Answer 1

As a young plant grows into a tree, there are many changes that are observed in its appearance and in the parts of the plant.

When plants are young, their stems are green but as they grow older their stems take up brown colour.

Another change which stems undergo as they are growing is the change in the thickness of their axis.

Answer 2

Answer:

one more point is that when they grow older their stem hardens