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Organization : being structurally composed of one or more cells.

Organization : being structurally composed of one or more cells — the basic units of life.

Metabolism : transformation of energy by converting chemicals and energy into cellular components (anabolism) and decomposing organic matter (catabolism).

Living things require energy to maintain internal organization (homeostasis) and to produce the other phenomena associated with life.

Growth : maintenance of a higher rate of anabolism than catabolism.