Definition that contains natural selection
- darwin English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
- spencer English philosopher and sociologist who applied the theory of natural selection to human societies (1820-1903)
- darwinism a theory of organic evolution claiming that new species arise and are perpetuated by natural selection
- herbert spencer English philosopher and sociologist who applied the theory of natural selection to human societies (1820-1903)
- charles darwin English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
- charles robert darwin English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
- polymorphism (genetics) the genetic variation within a population that natural selection can operate on