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Question : (a)State the form in which the following are stored.(i)Unused carbohydrates in plants.(ii)Energy derived from in human .(b)Describe the process of nutrition in amoeba with the help of diagram. |
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Answer» Solution :(a) i. As starch in fruits / storage roots tubers etc. ii. As glycogen.(b)Amoeba is a unicellular eukaryotic organism that exhibits holozoic mode of NUTRITION. FIVE steps are involved in this mode of nutrition NAMELY ingestion. absorption, assimilation andegestion. Ingestion - Amoeba feeds on microscopic organisms. It takes in food using finger likeprojections CALLED pseudopodia. It encircles the food and ENGULFS or ingests it by a process called phagocytosis. The food comes to lie in a vesicle called phagosome or food vacuole. Digestion - a lysosome fuseswith phagosome and complex substances are brokendown into simplerones, Such type of digestionwhich occurs within a cell is referred as Intra cellular digestion. The digested food then diffuses into cytoplasm. Absorption and Assimilation - Thedigested food which has diffused into the cytoplasm are quickly absorbed by the organisma nd comverted into constituents of protoplasm. Egestion - The undigested food material reaches the rear end of the organism and is thrown out by the process of exocytosis. The membrane of the vesicle fuses with thesurface membrane. |
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