Question

what changes do occur on the outer layer of young stem when it becomes a tree?
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Answer 1

Explanation:

The external layer of a youthful stem winds up harder when it grow up as a tree it occurs because of Sclerenchyma tissue! External layer of the trees is secured with bark, which gives it quality and shields the plant from damage and disease.

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Answer 2

Answer:

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Explanation:

he increase in length of the shoot and the root is referred to as primary growth. It is the result of cell division in the shoot apical meristem. Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem.

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