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Angiosperms

Angiosperms. Seed plants that produce seeds enclosed in a fruit and are flowering. Characteristics. Flowering plants Produce seeds enclosed in fruits Live almost everywhere—frozen tundra, deserts, and tropical jungles. Flower. The reproductive structure of an angiosper m.

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Angiosperms

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  1. Angiosperms Seed plants that produce seeds enclosed in a fruit and are flowering.

  2. Characteristics • Flowering plants • Produce seeds enclosed in fruits • Live almost everywhere—frozen tundra, deserts, and tropical jungles

  3. Flower • The reproductive structure of an angiosperm

  4. Structure of a Flower • Sepals-leaf like structures that protect the developing flower (bud) • Petals-colorful leaf like stuctures-shape,size and number vary • Inside the petals • Stamens • Pistils

  5. Stamens • Male reproductive part of a flower • Has 2 parts • Filament-the thin stalk • Anther-saclike structures found on top of the filament that contains the pollen-pollen contains cells that become sperm cells

  6. Pistils • Female reproductive part • Found in the center of most flowers • Can have more than one • 3 parts • Stigma-sticky tip • Style-slender tube connects stigma to ovary • Ovary-hollow structure which protects the seeds and contains one or more ovules.

  7. Pollinators • Birds, bats, bees • Attracted to color or shape of the petals and scent • Transfers pollen

  8. Reproduction of Flowering Plants • Pollen from an anther falls on a flower’s stigma • If it falls on the stigma of a similar plant, fertilization occurs. • The sperm cell joins with the egg cell inside an ovule within the ovary. • The zygote begins to develop into the embryo • As the seed develops, the ovary changes into a FRUIT. • Fruit is the way the seeds are dispersed- animals eat the fruit and “release” the seeds.

  9. Types of Angiosperms • 2 major groups • Monocots • Dicots Monocots-have only one seed leaf-grasses, corn, wheat, tulips, lilies. Flowers have 3 petals or multiples of three—(6,9,12)Leaves are long an slender with parallel veins and vascular tissue is scattered throughout. Dicots-seeds have two seed leaves—roses, violets, oak and maple trees. Flowers have 4 or 5 petals or multiples of those numbers. Leaves are wide with branching veins. Vascular tissue is usually arranged in a ring.

  10. Useful products • Food • Clothing-cotton and flax • Medicine • Rubber for tires • Furniture/lumber • These are renewable products!

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