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Structures of Seed Plants (Ch 12, Section 4: Text 374-379 or SIR )

Structures of Seed Plants (Ch 12, Section 4: Text 374-379 or SIR ). What are 2 Kinds of Vascular Tissues?. Xylem (zi-lem) : Transports Water and Minerals from roots to shoots Phloem (flo-em) : Transports Food Materials Both types of vascular tissues are in all parts of vascular plants

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Structures of Seed Plants (Ch 12, Section 4: Text 374-379 or SIR )

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  1. Structures of Seed Plants(Ch 12, Section 4: Text 374-379 or SIR )

  2. What are 2 Kinds of Vascular Tissues? • Xylem (zi-lem): Transports Water and Minerals from roots to shoots • Phloem (flo-em): Transports Food Materials • Both types of vascular tissues are in all parts of vascular plants • Recall that nonvascular plants, such as mosses don’t have conducting tissues (vessels) to transport water, minerals or food.

  3. ROOTS What are 3 Functions? • Absorb water & dissolved materials from soil • Hold plants to soil • Store surplus food made during photosynthesis Can be above or below ground

  4. Stems What are Functions? • Connect roots to leaves & reproductive structures • Support plant body • Transport materials from roots to leaves and reproductive structures • Some also store materials (cactus)

  5. Stems • Stems vary in shape and size • Some are underground • Tree trunks are stems

  6. Leaves What are functions? Main job: make food via photosynthesis • Chloroplasts in leaf cells capture energy • Absorb carbon dioxide from air • Use captured energy to make food (sugar) from carbon dioxide and water

  7. Flowers • Function #1- Structure of Reproduction • Parts: • Stamen: Male reproductive structure / Produces pollen • Pistil: Female productive structure • Ovary: Located at base of pistil / produces eggs in ovule • Ovule: Located in ovary / produces embryo sac (egg) that develops into a seed after fertilization

  8. Flowers Function #2: Helping reproductive process by • Bright/fragrant: attract insects to pollinate • Smell bad: attract flies to pollinate • Produce nectar: sugar to attract birds/insects No Flowers? (Gymnosperms) Depend on wind to spread pollen (pollination); conifers (pines) and cycads (palms) common gymnosperms

  9. Flowering and Non-Flowering Seed Plants • Angiosperms = seed plants with flowers & fruits. • Gymnosperms = seed plants without flowers or fruit. Examples: Conifers (pines and evergreens), Cycads (palms), others • Both need pollen to transfer from male to female (= pollination) for reproduction to happen

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