The stability of growth and division of very simple organisms has been considered to be a consequence of the internal Organization and Information content of its structure. An environment is able to influence the stability of growth and division of any given structure only in a neutral or destructive way. Mutations also belong to this category of influences, because they can be considered as a destruction of the given structure and a replacement of that structure by a new one (in some cases "better" then the former but still new). The environment is usually assumed to be purely random, and long cyclic changes of the environment with the periods many times longer than the one-generation lifetime are, in case of simple organisms, abandoned.
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