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All living things (organisms) must maintain homeostasis


The obtaining and processing of food materials (nutrients)


Combining of simple substances to form more complex substances


The increase in size of an organism


Removal of metabolic waste


The absorption and distribution (circulation) of materials throughout an organism


The ability of organisms to produce more of their own kind (essential to the species but not to the individual)


Release energy stored in nutrients


The coordinated response of an organism to a changing environment in order to maintain homeostasis


The sum total of all the life processes required to sustain life; includes all the chemical reactions that occur at the cellular level


The maintenance of stable (constant) internal environment

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