AP BIOLOGY

Detailed explanation-1: -The seed plants are often divided arbitrarily into two groups: the gymnosperms and the angiosperms. The basis for this distinction is that angiosperms produce flowers, while the gymnosperms do not.

Detailed explanation-2: -Angiosperms and gymnosperms are both seed-bearing plants with a few similarities. This is due to the fact that gymnosperms were present for at least 200 million years before the angiosperms evolved, and they may have shared a common ancestor. The main difference between angiosperms and gymnosperms is their diversity.

Detailed explanation-3: -Classification of Seed Plants The two major types of seed plants are the gymnosperms (seeds in cones) and angiosperms (seeds in ovaries of flowers). Figure below shows how the seeds of gymnosperms and angiosperms differ.

Detailed explanation-4: -Angiosperm diversity is divided into two main groups, monocot and dicots, based primarily on the number of cotyledons they possess.