How pitcher plants depend on their nutrition in the marshy area?
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Pitcher plant derives nutrition just the way any other plant does . It takes water and minerals from the soil and food by photosynthesis. But the soil in which it grows doesn't has nitrogen so it uses the pitcher for killing small insects and then digesting them to derive nitrogen from the animal.
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Pitcher plants grow on nitrogen deficient soil. To fulfill the requirement of nitrogen, they feed on insects. If any flying or crawling insect sits on it, the lid closes and the insect gets trapped. Pitcher plants have hair like structures which are pointed downwards and the insect trapped inside finds it difficult to escape. The pitcher plant secretes digestive juices which digest the insect.
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