In botany, a leaf is an above-ground plant organ specialized for photosynthesis.
A leaf is typically flat and thin, to expose the chloroplast containing cells to light over a broad area, and to allow light to penetrate fully into the tissues.
Leaves are also the sites in most plants where respiration, transpiration, and guttation take place.
For more information about the topic Leaf, read the full article at Wikipedia.org, or see the following related articles:
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