Definition of Biological Evolution

Biological evolution is a process that happens in all the living organisms and this is the mean by which differences are introduced in them. Charles Darwin proposed the basis of evolution that the species that is the fittest of all, survive. The evidence that supports the evolution theory comes directly from the fossil record and from the studies of nucleic acids (DNA, RNA), the development of an embryo, and the structures and functions of organisms.


The evolution is verified by paleontological records as well as by the help of breeding experiments that are being performed in labs. Even the smallest alterations in the nucleotides lead to structural and chemical changes in the population.

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