Meristematic tissues in plants

What is the role of the meristematic tissue in plants?

Mention two locations of meristematic tissue in plant body.

In the diagram of location of meristematic tissue in plant body given below, identify the type of meristematic tissue found in the regions marked 'A' and 'B' of a stem.

Meristematic tissues are

Meristematic tissues include

Meristematic tissues have