Megaspores are produced from the megaspore mother cells after

Megaspores are produced from megaspore mother cell after meiotic division and the process is called megasporogenesis.
(1) Megaspores are not produced by mitotic division from megaspore mother cell. They are products of meiosis.
(2) Megaspore formation from a megaspore mother cell does not involve the formation of a thick wall.
(3) Differentiation process is not involved in the formation of megaspores from the megaspore mother cell.