Evolution: The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

Adaptations: A change or the process of change by which an organism or species becomes better suited to its environment.

Natural Selection: the process whereby organisms better adapted to their environment tend to survive and produce more offspring.

Common Descent: Is the scientific theory that all living organisms on Earth descended from a common ancestor.

Mutations: The changing of the structure of a gene

Gene Pool: The stock of different genes in an interbreeding population.

Analogous Structures: Similar in function but having different evolutionary origins.

Adaptive Radiation: The diversification of a group of organisms into forms filling different ecological niches.

Fitness: An organism's ability to survive and reproduce in a particular environment.

Artificial Selection: The breeding of plants and animals to produce desirable traits.

Homologous Structures: Parts of different organisms that develop from similar tissues in early development.

DNA Shuffling: Is a way to rapidly propagate beneficial mutations in a directed evolution experiment.

Speciation: The formation of new and distinct species in the course of evolution.

Biodiversity: The variety of life in the world or in a particular habitat or ecosystem.

Convergent Evolution: Is the independent evolution of similar features in species of different lineages.