Darwin used the theory of natural selection to explain the process of evolution. Evolution is a continuing process of natural selection that leads to the gradual change of an organism over time.

Discover the science behind natural selection and evolution. Get the facts on survival of the fittest with ExtremeTech’s ...

As Charles Darwin (1859) argued in On the Origin of Species, if the following conditions are met, natural selection must occur: There is variation among individuals within a population in some trait.

“On the other hand, we may feel sure that any variation in the least degree injurious would be rigidly destroyed.” – the often overlooked flip-side of natural selection. Some variations are ...

Microbes profoundly impact evolution, shaping traits alongside genes. Holobiont biology highlights how hosts and microbes ...

Today, with access to heretofore unprecedented data sets for the study of human genetic variation, researchers can exploit the genetic signatures of natural selection using novel analytical methods.

They weren't at all certain that natural populations contained enough genetic variation for natural selection to create new species. So they entertained other explanations, including inheritance ...

This may allow Daphnia pulex to more easily adapt to a change in their environment, as they have a greater degree of genetic variation Natural selection is the process by which certain traits ...

Moreover, he showed that natural populations included enough heritable variation for natural selection to work. Dobzhansky thus bridged the gap between laboratory experiments and field observation ...

Topics covered include the history of evolutionary thought, the evidence for evolution, the generation and maintenance of population-level variation, natural selection, adaptation, sexual selection, ...

Species close speciesA type of organism that is the basic unit of classification. Individuals of different species are not able to interbreed successfully. are extinct if there are no living ...