Question

why do the cells present in meristematic tissue hv no vacules

Answer 1

Vacuole is a cell organelle used to store waste materials, store nutrients, excess salts etc. and usually big and more in number in mature cells. Meristematic cells are mainly concerned with cell division. Their primary function is mitosis. They do not have any waste material to store so vacuoles are usually absent in the meristematic cells.
                              (or)
Vacuole is a cell organelle used to store waste materials, store nutrients, excess salts etc. and usually big and more in number in mature cells