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Concept 14 - Concept 52.3 The exponential model describes...

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Concept 52.3 The exponential model describes population growth in an idealized, unlimited environment All populations have a tremendous capacity for growth. However, unlimited population increase does not occur indefinitely for any species, either in  the laboratory or in nature. The study of population growth in an idealized, unlimited environment reveals the capacity  of species for increase and the conditions in which that capacity may be expressed. Imagine a hypothetical population living in an ideal, unlimited environment. For simplicity’s sake, we will ignore immigration and emigration and define a change in  population size during a fixed time interval based on the following verbal equation.  Change in population size       =           Births during                   Deaths during during time interval time interval                     time interval
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