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BOTANY PowerPoint Presentation

BOTANY

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BOTANY

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Presentation Transcript

  1. BOTANY

  2. Botany Questions • How did you use/benefit from plants over the last 24 hours? • What are the major plant organs? • What do vascular tissues do?

  3. Food Products • Vegetables (non-reproductive parts)

  4. Food Products • Fruits • Food from ovaries of flowers

  5. Food Products • Legumes • Soy bean, green beans, peanuts • Nuts • Walnut, almond

  6. Adaptation to Land • Cuticle • Waxy, waterproof barrier prevents evaporation • Stoma • Gas exchange

  7. Adaptation to Land • Seeds • Embryo + food + seed coat Provides post-germination energy May include dispersal mechanisms

  8. Adaptation to Land • Vascular System

  9. Adaptation to Land • Vascular System • Vascular bundles contain both tissue types

  10. Plant Phylogeny

  11. Mosses (Bryophytes) • Mostly haploid • No cuticle • No vascular system • No seeds

  12. Ferns • Mostly diploid • Cuticle • Vascular system • No seeds

  13. Gymnosperms • Mostly diploid • Cuticle • Vascular system • Seeds (from cones)

  14. Angiosperms

  15. Monocots & Dicots Monocotyledons Cereal crops, grasses, palm trees One seed leaf Dicotyledons Beans, roses, cactuses, most trees Two seed leaves

  16. Monocots & Dicots

  17. Stems • Function • Transport of materials between roots and leaves • Elevation of flowers and leaves

  18. Secondary Growth • Vascular cambium produces new xylem (to the inside) and phloem (to the outside). Vascular Cambium Phloem Xylem

  19. P Secondary Growth P P P P P P P P P P P P VC VC P P VC VC X X P VC VC X X X X VC X X X X X X X X X X X X X

  20. Stems Vascular Cambium Summerwood Springwood Summerwood Springwood Phloem Xylem

  21. Stems

  22. Leaves • Function • Produce carbohydrates • Structure • Mesophyll • Vein • Xylem on top • Phloem on bottom

  23. Plant Review Monocot or Dicot?

  24. Plant Review • What flower parts are female? • How are dead xylem cells still functional? • What is a common source for the flow of phloem sap? What’s a common sink? • What comprises the bark of trees? • What is the advantage of plants expending large amounts of energy for large, showy flowers?