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Unformatted text preview: of an organism. To keep life intact there is an exchange of chemical matter from cell to environment and environment to cell. Organic matter from the environment is absorbed by the cell and utilized for preparing energy. The energy thus prepared is used to perform the functions of the cell. Unlike in nonliving things, a number of physical and chemical changes take place in the body of the organism. The sum total of physical and chemical changes in an organism is called metabolism. Metabolism includes anabolism in which complex organic substances are built up and energy is stored, and catabolism in which the complex organic substances are broken down to release energy. These changes of conservation and release of energy continuously take place in the organism. This energy is basically in the form of chemical energy. Nonliving matter does not show this kind of exchange of energy....
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This note was uploaded on 11/10/2011 for the course BIOLOGY bi 101 taught by Professor - during the Fall '10 term at Montgomery.
- Fall '10