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General characteristics of a leaf:
1. Leaves are the most important appendages as they carry out photosynthesis and also help to remove excess amount of water from plant body through transpiration.
2. Leaves are exogenous in origin and develops from leaf primordium.
3. Leaf is dorsiventrally flattened lateral appendage of stem, produced at nodal region.
4. Leaf is thin, expanded and green due to presence of photosynthetic pigments, i.e. chlorophyll.
5. Axil of leaf shows presence of axillary bud.
6. Leaf shows limited growth, does not show apical bud or a growing point.
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