AP BIOLOGY

Detailed explanation-1: -Moss sporophyte is differentiated into the foot, seta and capsule. Foot serves to get nutrition for developing sporophyte. Seta is the stalk of the capsule. Capsule bears archespores within the capsule wall.

Detailed explanation-2: -Sporophyte is differentiated into food, seta and capsule.

Detailed explanation-3: -The sporophyte is the diploid generation of a plant that produces haploid spores via meiotic divisions. In bryophytes, the sporophytes are always unbranched and produce a single sporangium (spore-producing capsule), but each gametophyte can give rise to several sporophytes at once.

Detailed explanation-4: -Seta is one of the sporophytes which represents the spore of bryophytes, but in case of sphagnum, the seta is absent and other spores present.

Detailed explanation-5: -The seta and stomata of peristomate mosses are interpreted as sporophytic devices for increasing nutrient transfer. The seta connects the foot, where nutrients are absorbed, to the developing capsule, where nutrients are needed for sporogenesis.