AP BIOLOGY

Detailed explanation-1: -Gametophytes grow from spores, which are produced by the sporophyte in structures called sporangia. The spores themselves are produced via meiosis, and are haploid (n). The spores then undergo mitosis, growing into the gametophyte.

Detailed explanation-2: -The gametophyte is the sexual phase in the life cycle of plants and algae. It develops sex organs that produce gametes, haploid sex cells that participate in fertilization to form a diploid zygote which has a double set of chromosomes.

Detailed explanation-3: -In flowering plants, the gametophyte generation takes place in a flower, which forms on the mature sporophyte plant. Each male gametophyte is just a few cells inside a grain of pollen. Each female gametophyte produces an egg inside an ovule. Pollination must occur for fertilization to take place.

Detailed explanation-4: -The sporophyte generation is dependent on the photosynthetic gametophyte for nutrition. Cells within the sporangium of the sporophyte undergo meiosis to produce male and female spores, respectively.