IB Topic 9 Plants PPT - HL
- 2. BryophytesSimple plants, limited sizeHold loose dirt in placeLive in moist areasDepend on external water transport for reproduction: motile male gameteNo vascular tissue = movement through osmosis/diffusionNo true roots = have rhizoids - like root hairs (absorb water, anchor plant)No stemsNo leaves = similar structures but only one cell thick. Produce spores in a capsule at end of a stalkmossliverwort
- 3. Have vascular tissue: can be biggerXylem: H2O + mineralsPhloem: sap (sugar, AAs, hormones...)Live in moistareasHave roots, stems and leaves (fronds)Motile male gametes: can occupy terrestrial environments BUT still needs water for reproductionSpores produced in sporangia, generally on the underside of the leafLeaves are curled, and then uncurl as they matureFilicinophytes, or Fernsfrondyoung frondrhizomeroots
- 5. ConiferophytesConifere.g. pines, spruces, firs, cypress, yewsContain 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 leavesOccupy all environmentsGametes are not motile (does not need water for reproduction)Seeds are produced – develop inside the ovaries in the flowerOvary 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: protectionTwo types of angiospermophytesCotyledon= seed leafDifferences in leaves, arrangement of vascular tissue, root system and stem composition.Monocotiledonous x Dicotiledonous
- 18. Dicotyledenous PlantsBean, etc.Monocotyledenous PlantsCorn and wheat, etc.