| A | B |
|---|
| species | a group of organisms that are physically similar and can mate with each other and procude offspring that can also mate and reproduce |
| fossil | the preserved remains or traces of an organism that lived in the past |
| adaptation | a behavior or physical characteristic that allows an organism to survive or reproduce in its environment |
| evolution | the gradual change in a species over time |
| scientific theory | a well-tested concept that explains a wide range of observations |
| natural selection | a process by which individuals that are better adapted to their environment are more likely to survive and reprocude thatn others of the same species |
| variation | any difference between individuals of the same species |
| relative dating | a technique used to determine which of two fossils is older |
| fossil record | the preserved remains or traces of an organism that lived in the past |
| extinction | the disappearance of all members of a species from Earth |
| Charles Darwin | father of evolution |
