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Photosynthesis (Leaf Structure (Palisade tissue (Contains palisade cells…

- - - - The beaker in between the Elodea and the light provides insulation to maintain a constant temperature
      - The bubbles of gas produced may be collected and tested
      - Light intensity is altered by changing the distance between the lamp and the pondweed
      - A piece of the pondweed Elodea is placed under water, weighed down with a paperclip
- - - - Remove leaf from plant
      - Add iodine solution to test for starch
      - Place in boiling water for 30 seconds to kill it and remove waxy cuticle
      - Wash with cold water to soften
      - Boil in ethanol to remove chlorophyll
  - - - Leaf in dark
        
        yellow
      - Leaf in dim light
        
        orange
      - Leaf in light
        
        Purple
      - Control (no leaf)
        
        orange
    - - High concentrations of CO2 (more than 0.04%)
        
        yellow
      - CO2 in normal air (0.04%)
        
        orange
      - Low concentrations of CO2 (less than 0.04%)
        
        purple
- - - - Making DNA, ATP et al. Part of cell membranes
        
        Poor root growth, younger leaves turn purple
    - - Needed for enzymes of respiration and photosynthesis to work
        
        Leaves turn yellow with dead spots
    - - Making amino acids, proteins, chlorophyll, DNA et al.
        
        Limited Growth of plant, older leaves turn yellow
    - - Part of chlorophyll molecule
        
        Leaves turn yellow