Assertion :Phase of cell division is also known as formative phase.
Reason :In formative phase new cells are produced from pre-existing cells through meiosis.

The first phase of the three phases of growth is the formative phase. The formative phase consists of the constantly dividing cells. Hence, the phase of cell division is called as the formative phase.

All cells in an organism result from the division of pre-existing cells through mitosis (not meiosis).

So, the Assertion is correct but Reason is incorrect.