Leaf Shapes
Plant leaves absorb sunlight and carbon dioxide for photosynthesis, the process of converting sunlight, carbon dioxide and water into a chemical used for energy. Pores on the leaf absorb the carbon dioxide, but they also allow water to escape in a process called transpiration. The conflicting needs to intercept light and take up carbon dioxide on the one hand, and to conserve water on the other, have resulted in a number of different leaf shapes in different environments.
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