in nonvascular plants, spores are produced in a structure called the
Reproduction in Nonvascular Plants ï Nonvascular plants have a life cycle called alternation of generations. â¢ A gamete-producing stage (gametophyte) alternates with a spore-producing stage (sporophyte).â¢ Gametophytes produce gametes (eggs and sperm) in separate multicellular structures.eproductive Structures of Seed Plants ï Reproduction in seed plants (gymnosperms and angiosperms) is very different from reproduction in seedless plants. ï You need a microscope to see the gametophytes of seed plants. ï Spores are not released from seed plants.