Publisher Summary Chemostats are open systems in which nutrients are continually added
at a constant rate and spent medium plus cells removed at the same rate, such that a
constant volume is maintained. Thus, they are designed to provide a constant,
homogeneous environment in which the cells grow at a constant rate. Chemostats are used
in two ways to study evolution. The first approach attempts to characterize natural selection
in terms of how selection coefficients change as either the genetics or the environment is�…