Many factors contribute to the idea of gradual speciation, but all fall under the same theory of evolution. Webster defines evolution as "the theory that groups of organisms change drastically and smoothly with passage of time, mainly as a result of natural selection or chance, so that descendants ...

Many factors contribute to the idea of gradual speciation, but all fall under the same theory of evolution. Webster defines evolution as "the theory that groups of organisms change drastically and smoothly with time, mainly as a result of natural selection or chance, so that descendants differ morp...

Jean Baptiste Lamarck The French Naturalist Jean Baptiste Lamarck pronounced the first comprehensive theory of evolution in the beginnings of the 19th century. His theory, the theory of acquired characteristics, had three parts and is as follows: 1) Theory of need- the production of a new organ o...

Evolution is the change in a gene pool of a population over time. It is the theory that groups of organisms change with passage of time, mainly as a result of natural selection, so that descendants differ from their ancestors. In order for this theory to hold true, some things must be observed. F...