AP BIOLOGY

Detailed explanation-1: -The sporophyte produces spores by meiosis. The spores grow into gametophytes. The gametophytes produce gametes (eggs and sperm).

Detailed explanation-2: -The gametophyte is the sexual phase in the alternation of generations of plants and a few algae. This stage produces gametes that undergo alternation of generations. It is a haploid phase producing the zygote from which sporophytes arise.

Detailed explanation-3: -Fertilization occurs when the motile sperm swim up the neck canal of the archegonium and reach the egg. A zygote is formed by the fusion of the sperm and egg. The zygote will undergo embryogenesis within the archegonium.

Detailed explanation-4: -The gametophyte produces structures known as antheridia and archegonia, which produce the male and female gametes respectively. Collectively these structures are known as gametangia.