State the role of spines-the modified leaves
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Explanation:
Like other organs, leaves are often modified for functions other than photosynthesis. ... In some plants the entire leaf is a tendril; photosynthesis in these plants is delegated to leaflike structures called stipules at the base of each leaf.
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Spines are generally present in plants which occupy areas with little or no rainfall. They are mode of adaptation which prevents plants from losing water due to transpiration. Transpiration involves evaporation of water from stoma, and as spines don't contain stoma, transpiration does not occur. An example of a plant with spines is opuntia (or cactus)
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