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Vascular Plants with Seeds. These plants do not require water for sexual reproduction. They reproduce by seeds rather than spores. Seeds are multicellular and contain a young plant called an embryo. Characteristics of Seed Plants.
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Vascular Plants with Seeds These plants do not require water for sexual reproduction. They reproduce by seeds rather than spores. Seeds are multicellular and contain a young plant called an embryo.
Characteristics of Seed Plants • All seed plants have vascular tissue that transports water and nutrients throughout the plant. • They also have roots, stems, and leaves.
Vascular Plants with Seeds There are two groups of seed plants—cone-bearing gymnosperms and flowering angiosperms. Two main groups of seed plants: Gymnosperm Angiosperms
Gymnosperms • In gymnosperms, seeds are produced in a cone. • Different types of gymnosperms include conifers, cycads, ginkgoes, and gnetophytes. Siede Preis/Getty Images
gymnosperms • the seed plants that do not first produce a flower before the seed • means "naked seed" - produce seeds not covered by the walls of an ovary • do not form flowers or fruits • produce cones or cone-like structures
Angiosperms • There are more than 260,000 species of flowering plants, or angiosperms. • Almost all of the food eaten by humans comes from angiosperms or from animals that eat angiosperms.
angiosperms • The Flowering Plants – means “covered seed” • All have seed enclosed in a fruit • All have flowers (not all are colorful blossoms - corn tassels and catkins of oak trees)
Angiosperms • Angiosperms produce seeds that are part of a fruit. • Fruit grows from parts of a flower. • All angiosperms produce flowers. CORBIS
Angiosperms – sub divisions • Annuals • Biennials • Perennials
Angiosperms - Annuals Plants that grow, flower, and produce seeds in one growing season are called annuals.
Angiosperms - Biennials • Biennials complete their life cycles in two growing seasons. • During the first year, the plant grows roots, stems and leaves. • In the second growing season the plant produces new stems, leaves, flowers, and seeds.
Angiosperms - Perennials • Perennial plants, like trees and shrubs, can live for more than two growing seasons. • Flowering plants are organized into two groups—monocots and dicots. • These groups are based on the number of leaves in early development, or cotyledons, in a seed.
Angiosperms subcategories • Monocots • Dicots • Flowering plants are organized into two groups—monocots and dicots. • These groups are based on the number of leaves in early development, or cotyledons, in a seed.
