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Blue-dyed chrysanthemum flower in water
White chrysanthemum flower (Chrysanthemum sp.) dyed blue. The flower stem was placed in water that had blue food colouring added to it. The petals on the flower transpire, they allow water to evaporate as an outcome of the process of gaining carbon dioxide from the air. Water flows upward through the stem by a combination of capillary action and the difference in hydrostatic pressure. Water enters the stem and roots by osmosis, bringing with it dissolved nutrients.
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