Abstract

Bacteria are small, unicellular organisms whose ecological niche comprises an incredibly large number of microcosms which are subject to frequent and cataclysmic changes in their physical and chemical properties (Stanier, 1953). Evolutionary survival of these organisms has depended not only upon their ability to grow as rapidly as possible under a wide variety of ambient conditions, but also upon their ability to adjust as rapidly as possible to frequent changes in these conditions. Thus it is not surprising to find that bacteria possess many regulatory devices which render their metabolic processes adaptively responsive to the environment. These devices permit adjustment of the cells' internal affairs so as to allow a rapid, orderly synthesis of protoplasm in the face of inconstant ambient conditions.

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