DENDROLOGY

Detailed explanation-1: -During megasporogenesis, diploid megaspore mother cells undergo meiosis and give rise to haploid megaspores, which then, during megagametogenesis, develop into haploid female gametophytes.

Detailed explanation-2: -POLLEN DEVELOPMENT In flowering plants, as in other groups of plants, a diploid, spore-producing generation (sporo-phyte) alternates with a haploid, gamete-producing gen-eration (gametophyte).

Detailed explanation-3: -Male gametophyte is the haploid stage that produces male gametes. It derives from the microspore. Female gametophyte is the haploid stage that produces female gametes. It derives from the megaspore. Male gametophyte is inside the pollen grain while female gametocyte is inside the ovule.