IB Topic 9 Plants PPT - HL

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IB Topic 9 Plants PPT - HL

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

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