Division of Labor
in biology, a conception borrowed from economics and introduced into biology by Milne- Edwards, to describe the difference of DIVORCE function exhibited by the individual members of an animal colony, or by the different organs, tissues, and cells of a single organism. Th The figure of a hydroid colony, Hydractinia, shows how members, primarily and fundamentally the same in structure, become set apart as nutritive, reproductive, sensitive, and protective. The same division of labor or predominance of special functions in different individuals is beautifully illustrated in the Siphonophora.