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Plant Structure and G rowth

Plant Structure and G rowth. Topic 9 AHL IB BIOLOGY. STARTER : Label the parts of a flower. Learning Objectives. Draw and label plan diagrams to show the distribution of tissues in the stem and leaf of a dicotyledonous plant.

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Plant Structure and G rowth

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  1. PlantStructure and Growth Topic 9 AHL IB BIOLOGY

  2. STARTER: Labeltheparts of a flower

  3. LearningObjectives • Draw and labelplan diagrams to show the distribution of tissues in the stem and leaf of a dicotyledonous plant. • Outlinethree differences between the structures of dicotyledonous and monocotyledonous plants. • Comparegrowth due to apical and lateral meristems in dicotyledonous plants. • Explainthe role of auxin in phototropism as an example of the control of plant growth.

  4. GROUP THOUGHT: Can youlist 3 differencesbetweenmonocots and dicots?

  5. GROUP THOUGHT: Whydoesmowingthelawnnotkillthegrass? BONUS: Spot thegrammarmistake!

  6. Watchthis virtual experiment What do youseehappenning? Why do youthinkthisishappenning?

  7. What’shappenninghere?

  8. PastPaperQuestion (a) apical and lateral (b) 2 max StructureMonocotyledonousDicotyledonus leaf parallel veins branched (net of) veins; seed one cotyledon two cotyledons; flower floral parts in multiple of 3 floral parts in multiple of 4 or 5; stem scattered vascular bundles ring of vascular bundles around central pith; root adventitious roots branched tap roots; Award [1] for each correct line (c)auxinproduced at apical meristem / tip; transported to growing area / zone of cell growth; lateral transport to cells on shade side; results in cellexpansion; shoot “grows” towards light source; experimental detail; 3 max

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