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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.

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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