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Plant Diversity

Explore the success of flowering plants in reproduction, comparing characteristics of mosses, ferns, seedless vascular plants, gymnosperms, and angiosperms. Learn about different reproductive organs, seeds, and adaptations crucial for plant diversity.

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Plant Diversity

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  1. Plant Diversity Essential Question: What characteristics of flowering plants make them most successful at reproducing?

  2. Floweringplants Cone-bearingplants Ferns andtheir relatives Flowers; SeedsEnclosed in Fruit Mosses andtheir relatives Seeds Water-Conducting(Vascular) Tissue Green algaeancestor

  3. Cone-bearing plants760 species Floweringplants235,000 species Ferns andtheir relatives11,000 species Mosses andtheir relatives15,600 species

  4. 1. Bryophytes • Mosses and their relatives • No vascular tissues • Absorb water by osmosis close to the ground  keeps them small • Rely on water to allow sperm (in spores) to swim to egg

  5. Floweringplants Cone-bearingplants Ferns andtheir relatives Flowers; SeedsEnclosed in Fruit Mosses andtheir relatives Seeds Water-Conducting(Vascular) Tissue Green algaeancestor

  6. 2. Seedless vascular plants • Include club mosses, horsetails, and ferns. • Have true roots, leaves, and stems • Reproduce using spores and require water

  7. Club mosses Horse tails Ferns

  8. Floweringplants Cone-bearingplants Ferns andtheir relatives Flowers; SeedsEnclosed in Fruit Mosses andtheir relatives Seeds Water-Conducting(Vascular) Tissue Green algaeancestor

  9. Seed coat Seed Embryo Wing Storedfood supply 3. Gymnosperms • Cone-bearing plants • Bear their seeds directly on the surface of cones • Seed includes embryo, food supply (endosperm), & protective seed coat

  10. Examples Cycads Gnetophytes Conifers Gingko

  11. Floweringplants Cone-bearingplants Ferns andtheir relatives Flowers; SeedsEnclosed in Fruit Mosses andtheir relatives Seeds Water-Conducting(Vascular) Tissue Green algaeancestor

  12. 4. Angiosperms • Develop unique reproductive organs known as flowers • Seeds are enclosed in fruit

  13. Flowering plants divided into 2 groups: • Monocotyledons • Ex. Wheat, grasses, lilies, bamboo, corn • Dicotyledons • Ex. Most trees & shrubs, roses, daisies Cotyledon = embryonic seed leaf

  14. Monocot vs Dicot Roots Tap Fibrous

  15. Monocot vs Dicot Stems Asparagus Alfalfa

  16. Monocot vs Dicot Stems Zea Mays Ranunculus

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