AP BIOLOGY

Detailed explanation-1: -It includes both angiosperms (flowering plants) and gymnosperms (non-flowering plants). They have evident sex organs or phanerogamae. In gymnosperms, the seeds are naked, whereas in angiosperms, it is enclosed.

Detailed explanation-2: -Plants are classified into two groups: nonvascular plants and vascular plants. Vascular plants are further divided into those that reproduce without seeds and those that reproduce with seeds. Seed plants are divided into those that produce seeds in cones and those that produce seeds in the ovaries of flowers.

Detailed explanation-3: -Nonflowering plants are divided into two main groups-those that reproduce with dustlike particles called spores and those that use seeds to reproduce. Spore-bearing plants are simple, or primitive, plants, for example mosses and ferns. These plants release thousands of tiny spores, which are spread by wind or water.

Detailed explanation-4: -Traditionally, the flowering plants have been divided into two major groups, or classes, : the Dicots (Magnoliopsida) and the Monocots (Liliopsida).

Detailed explanation-5: -Non-flowering plants include mosses, liverworts, hornworts, lycophytes and ferns and reproduce by spores. Some non-flowering plants, called gymnosperms or conifers, still produce seeds.