AP BIOLOGY

Detailed explanation-1: -Non-vascular plants include two distantly related groups: Bryophytes, an informal group that taxonomists now treat as three separate land-plant divisions, namely: Bryophyta (mosses), Marchantiophyta (liverworts), and Anthocerotophyta (hornworts).

Detailed explanation-2: -These are the nonvascular plants or bryophytes (mosses, liverworts, and hornworts), the seedless vascular plants (clubmosses and ferns including, horsetails, club mosses, and whisk ferns), gymnosperms (conifers, cycads, Ginkgo, and gnetophytes), and angiosperms, or flowering plants.

Detailed explanation-3: -They lack true roots, stems, or leaves. They are called non-vascular plants because of the absence of vascular tissues (xylem and phloem) that functions for the conduction of food, water, and minerals.

Detailed explanation-4: -Non vascular plants typically are small plants circumscribed in size as a result of poor transportation means of gases, water and other compounds. Vascular system is absent in non-vascular plants. A few algae, liverworts, hornworts and mosses are nonvascular plants.

Detailed explanation-5: -Nonvascular plants include liverworts, hornworts and mosses. They lack roots, stems, and leaves. Mosses are the most similar to vascular plants. Liverworts are named for the liver-shaped leaves of some species and Hornworts for their horn-like sporophytes.