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  1. The leaves of a plant exposed directly to sunlight are often thicker than leaves found in the shade. Suggest two reasons for this observation. 
  2. How does the observation in (1) improve the efficiency of leaves exposed to direct sunlight?

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  1. Leaves exposed to light have more palisade cells hence more chloroplasts and are thicker than those growing in shade
  2. Plants exposed to light have higher rates of photosynthesis;-Due to the greater concentration of chloroplasts
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