Natural selection can produce surprising results.It can produce more complex organisms, for example creating multicellular organisms from single-celled ones, but it can also simplify: for example ...

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.

Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes ...

To constitute natural selection, the difference in survival and/or reproduction cannot be due to chance, and it must have the potential consequence of altering the proportions of the different ...

It all comes down to natural selection, or the process by which species pass on the characteristics that enable them to survive. Natural selection is a mechanism of evolution—not evolution itself.