AP BIOLOGY

Detailed explanation-1: -1. They’re ancient plants. Mosses are non-flowering plants which produce spores and have stems and leaves, but don’t have true roots. Mosses, and their cousins liverworts and hornworts, are classified as Bryophyta (bryophytes) in the plant kingdom.

Detailed explanation-2: -The base of the seta is called the foot. The sporangium is the main body of the sporophyte and is the organ in which the spores are produced. As previously mentioned, most mosses will have a sporangium with these anatomical features: A sporogenous layer, a columella, peristome teeth, and an operculum.

Detailed explanation-3: -A moss is a flowerless, spore-producing plant-with the spores produced in small capsules. The introductory WHAT IS A BRYOPHYTE? page noted that bryophytes have a gametophyte stage and a sporophyte stage.

Detailed explanation-4: -Moss spores are produced from the sporophyte. The sporophyte contains three structures including a foot to attach it to a gametophyte where water and nutrients are stored, a seta which is the long stalk, and a capsule shaped like a pod that produces spores.

Detailed explanation-5: -Spore plants In liverworts, hornworts, and mosses, the dominant phase in the life cycle is the sexual gametophyte. In the lower vascular plants (vascular cryptogams, which lack true flowers and seeds) and the seed plants, on the other hand, the sporophyte is the dominant phase in the life cycle.