AP BIOLOGY

Detailed explanation-1: -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-2: -A few algae, liverworts, hornworts and mosses are nonvascular plants.

Detailed explanation-3: -At least 15, 000 species of moss have been discovered; mosses therefore represent the most diverse type of non vascular plants. Mosses possess rhizoids, small root-like parts of their stem, but these do not conduct nutrients in the manner as true roots in vascular plants.

Detailed explanation-4: -The Bryophytes, comprising mosses, liverworts and hornworts, are distinct groups of non-vascular plants which are very ancient in their origins.