DENDROLOGY

Detailed explanation-1: -In angiosperms, meiosis in the sporophyte generation produces two kinds of spores: (1) microspores which develop in the microsporangium and will germinate and develop into the male gametophyte generation and (2) megaspores that develop in the megasporangium will develop into the female gametophyte generation.

Detailed explanation-2: -The pollen grains are released from the anther to land on a stigma during pollination. The pollen grain germinates, forming a pollen tube that delivers the sperm to the egg in the ovule during fertilization. The sporophyte embryo develops in the seed. Upon germination of the seed, the sporophyte resumes growth.

Detailed explanation-3: -Two patterns of seed germination occur in angiosperms, depending on whether the cotyledons emerge from the seed: hypogeal (belowground germination) and epigeal (aboveground germination).