why cell is a fundamental unit .explain with example
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Cells are the structural and functional units of life. A cell is capable of independent existence and can carry out all the vital functions for living. A cell carries out nutrition,respiration,excretion,transportation and reproduction ,the way an individual organism does. Unicellular organisms are capable of independent existence which shows a cells capability to exist independently. Due to this, cell is called the fundamental and structural unit of life. All living beings are composed of the basic unit of life ,i.e. cell. Cells also need to manage a wide range of functions like growing and moving. In order to carry out all these things,cells need energy. The main energy source for most cells to function is ATP.