AP BIOLOGY

Detailed explanation-1: -Haploid (1n) spores germinate and undergo mitosis to produce a multicellular gametophyte (1n). Specialized cells of the gametophyte undergo mitosis to produce sperm and egg cells (1n), which combine in fertilization to make a zygote (2n).

Detailed explanation-2: -In mosses, the dominant stage is the haploid generation (the gametophyte). This means that the green, leafy gametophytic tissue is haploid (has only one set of chromosomes).

Detailed explanation-3: -Sporophyte means “spore-making plant.” The sporophyte produces haploid spores via meiosis. Haploid spores germinate and grow into the haploid gametophyte generation. Gametophyte refers to the “gamete-making plant.” This generation produces the gametes (egg and sperm) by mitosis.

Detailed explanation-4: -Gametophyte. The leafy green plant part of the moss that will either produce sperm or eggs.

Detailed explanation-5: -During fertilization in mammals, one haploid sperm fuses with a haploid egg to produce a diploid cell called a zygote, which then divides by mitosis to produce a new organism.