AP BIOLOGY

Detailed explanation-1: -Diploid sporophyte cells undergo meiosis to produce haploid spores. Each spore goes through mitotic divisions to yield a multicellular, haploid gametophyte.

Detailed explanation-2: -During the sporophyte stage, the plant produces spores with diploid or two sets of chromosomes (2n) by the process of mitosis. These spores later develop into gametophytes that produce gametes having a haploid or single set of chromosomes (n) by the process of meiosis.

Detailed explanation-3: -In the sporophyte phase a diploid (having two sets of chromosomes) plant body grows and eventually produces spores through meiosis.

Detailed explanation-4: -In higher plants like ferns and fern allies, the sporophyte stage is dominant. Gametophytes produce gametes (sperm and eggs) in a special structure called a gametangium (-ia), while sporophytes produce spores in a special structure called a sporangium (-ia). Second, all plants need to get water to their cells.