DENDROLOGY

Detailed explanation-1: -The microsporangium contains microspore mother cells, which divide by meiosis to produce haploid microspores. The microspores develop into male gametophytes that are released as pollen. The megasporangium contains megaspore mother cells, which divide by meiosis to produce haploid megaspores.

Detailed explanation-2: -each microspore develops into a microgametophyte (male gametophyte), which ultimately produces male gametes (sperm), and each megaspore produces a megagametophyte (female gametophyte), which ultimately produces female gametes (eggs).

Detailed explanation-3: -The gametophyte stage produces gametes (by mitosis) which fuse to form a zygote. The zygote divides by mitosis to form the large multicellular sporophyte stage. Mitosis and meiosis in Ferns (continued). The sporophyte produces haploid spores by meiosis.