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.

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

Detailed explanation-3: -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-4: -In bryophytes the long-lived and conspicuous generation is the gametophyte, while in vascular plants it is the sporophyte. Structures resembling stems, roots, and leaves are found on the gametophore of bryophytes, while these structures are found on the sporophytes in the vascular plants.

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.