The branch of science concerned with fossil animals and plants.
A distinct form resulting from such a change.
The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
The breeding of related individuals within an isolated or a closed group of organisms or people.
A method of dating geological specimens by determining the proportions of particular radioactive isotopes present in a sample.
The theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.