The stem of aquatic plant is waxy why?
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Since floating plants are in and around water all their life spans, to ensure that there is no rotting of leaves or the stem due to so much water, the waxy coating on the leaves proves useful. In essence, the waxy coating is a thick protective layer that comes between the plant and all that is outside it.
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The wax covering on the plant leaf, young stems and fruits called "cuticle". It composed of cutin, a wax like material produced by the plant that is chemically a hydroxy fatty acid. The purpose of this covering to help the plant retain water.
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