some form of isolating event must first happen to split one population in two that do not contact each other again until they will not or cannot interbreed anymore.
Evolution .
Cross-breeding occurs within the species.
The idea that new species form when isolated from the parent group is called genetic drift. The isolation can be as small as a few miles to thousands of miles.
By the theory of evolution, new species form through the process of natural selection. This process most often starts with a random mutation in the genome (a random gene suddenly changes or becomes a "mutation"). This mutation either helps, or hinders the new animal (or mutant if you will hehe). If it helps them survive better than the older species, then this new mutant species will become more abundant. If not, than the new species will die off. This process does not happen all at once though, it usually takes a generous amount of mutations and thousands of years for this to happen.
It takes a certain amount of time depending on the creature. You cannot tell how long or how short it can be. It could take a generation or a thousand generations. It all depends on the environment. The traits that species acquire are determined by what the environment selects. If the environment changes rapidly, then the species is going to evolve more quickly to fit the new environment, or in some cases, the environment changes too quickly for the species to evolve in which extinction can occur.
The word is evolution. It is the process whereby new types of creatures develop over time and others disappear.
Evolution .
speciation
Speciation
queen latifa species and michael jackson species<3
The general term for the formation of a new species is speciation.
they evolve to fill new niches
Cross-breeding occurs within the species.
New states are required to have a republican form of government.
Over billions and billions of years, an entire species slowly develops characteristics that they need to adapt to current conditions. If this is repeated enough times, a new species completely different from the original can "form". Or if you're really religious, your God makes new species or whatever.
they evolve to fill new niches
A new species may form.