Charles Darwin's theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. ... As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.

What is required for Darwinian evolution?

The core of Darwin's theory is natural selection, a process that occurs over successive generations and is defined as the differential reproduction of genotypes. Natural selection requires heritable variation in a given trait, and differential survival and reproduction associated with possession of that trait.

What is the Darwinian process?

darwinism. [dar´wĭ-nizm] the theory of evolution stating that change in a species over time is partly the result of a process of natural selection, which enables the species to continually adapt to its changing environment.