Question

Heterospory i.e., formation of two types of spores microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?

Answer 1

It is considered as precursor to seed habit. The microspores of angiosperms develops into male gametophyte and megaspores develops into female gametophyte or embryosac.