Front

A related organism from a previous generation.

Back

Ancestor

Front

A part of an organism (for example, one or more bones).

Back

Body structure

Front

Everything (living and nonliving) that surrounds an organism

Back

Environment

Front

The process by which species adapt to environmental changes over a very long time

Back

Evolution

Front

The process by which one population evolves into two or more different species

Back

Speciation

Front

a scientist who studies fossils in order to understand the ancient history of life on Earth

Back

paleontologist

Front

The mystery fossil

Back