ABSTRACT
This chapter is devoted to applications of iterations in biology, where in many cases the authors can manage with continuous functions of one variable. The simplest mathematical model of the population growth of a single species of living organisms is obtained by counting all the individuals of that species at given times. They also take into account, in the mathematical model, that the population growth is restricted. The authors wish to establish a mathematical model describing the evolution of a population of a single biological species in time, or, expressed in biological terminology, a one-species population growth model. Concluding this section, let the authors mention two more models of one-species population growth which are most frequently encountered in the literature.
