The scientific theory that population of organisms change over time.

A group of organisms of the same species who live at the same geographic area at the same time.

A distinguished quality or characteristic that can be passed from one generation to the next.

A trait that helps the organism survive in its environment.

A change in an organism’s DNA. This can sometimes change their traits.

A specific group of organisms that can produce fertile offspring.

A species dies off.

Humans breed for desired traits.

Organisms with the best traits will survive, have more offspring, and pass on their DNA to the next generation.

Each individual is slightly different from the next.

Living things that produce most likely will survive.

a branching diagram showing the cladistic relationship between a number of species.

the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

A structure in an organism that has lost all or most of its original function in the course of evolution.

an example of an organ or bone that appears in different animals.

the branch of biology and medicine concerned with the study of embryos and their development.