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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