Plants, Phytochromes and Light 0.0 / 5 ? BiologyHuman, animal and plant behaviourA2/A-levelEdexcel Created by: Ellie HadleyCreated on: 15-01-14 17:23 Which type of phytochrome is biologically active? Pfr (Far red) 1 of 8 Which type of phytochrome is more stable? Pr (Red) 2 of 8 What type of light does Pr absorb and what happens to it when it does this? Absorbs red light and changes to far Pfr 3 of 8 What type of light does Pfr absorb and what happens to it when it does this? Absorbs far red light and changes to Pr 4 of 8 Does sunlight contain more red light or more far red light? More red light 5 of 8 What type of phytochrome is most common in plants in the day? Pfr 6 of 8 Why is the conversion of Pfr back to Pr usually slow at night? Because the intensity of light is very little 7 of 8 What do scientists think phytochromes might do to plants? Trigger processes in plants - flowering, leaf fall, etc 8 of 8
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