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IB Topic 9 Plants PPT - HL

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  • 1. Plant Classification
    IB Biology
  • 2. Bryophytes
    Simple plants, limited size
    Hold loose dirt in place
    Live in moist areas
    Depend on external water transport for reproduction: motile male gamete
    No vascular tissue = movement through osmosis/diffusion
    No true roots = have rhizoids - like root hairs (absorb water, anchor plant)
    No stems
    No leaves = similar structures but only one cell thick.
    Produce spores in a capsule at end of a stalk
    moss
    liverwort
  • 3. Have vascular tissue: can be bigger
    Xylem: H2O + minerals
    Phloem: sap (sugar, AAs, hormones...)
    Live in moistareas
    Have roots, stems and leaves (fronds)
    Motile male gametes: can occupy terrestrial environments BUT still needs water for reproduction
    Spores produced in sporangia, generally on the underside of the leaf
    Leaves are curled, and then uncurl as they mature
    Filicinophytes, or Ferns
    frond
    young frond
    rhizome
    roots
  • 4. http://www.biology87.org/apbio/diversity/PlantLabPicts/statio6.jpg
    http://www.biology87.org/apbio/diversity/PlantLabPicts/statio4.jpg
  • 5. ConiferophytesConifer
    e.g. pines, spruces, firs, cypress, yews
    • Contain a well developed vascular tissue (big plants!), roots, stems (woody) and leaves
    • 6. Produce male (contain pollen) and female (contain ovules) cones
    • 7. Produce seeds which develop on the scales of the female cones
    • 8. Gametes are not motile: does not depend on water for reproduction
    • 9. Tough, needlelike leaves with thick cuticles and sunken stomata: adaptations for dry environments
    • 10. NO REAL FLOWERS + NO FRUITS
  • 11. Sequoias
    National Park in California
  • 12. AngiospermophytesFloweringPlants
    Flowering plants with roots, stems and leaves
    Occupy all environments
    Gametes are not motile (does not need water for reproduction)
    Seeds are produced – develop inside the ovaries in the flower
    Ovary develops into a fruit which aids in seed dispersal
  • 13. Drawing a flower:
    • Female Reproductive Organs: stigma + style + ovary = PISTIL
    • 14. Male Reproductive Organs: anther + filament = STAMEN
    • 15. Petals: attract animals
    • 16. Sepals: protection
  • Two types of angiospermophytes
    Cotyledon= seed leaf
    Differences in leaves, arrangement of vascular tissue, root system and stem composition.
    Monocotiledonous x Dicotiledonous
  • 17. Monocotiledonous x Dicotiledonous
  • 18. Dicotyledenous PlantsBean, etc.
    Monocotyledenous PlantsCorn and wheat, etc.

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