| A | B |
|---|
| Fossil | The remains of an organism that lived a long time ago |
| Natural Selection | The survival of offspring that have favorable traits |
| Evolution | Process by which a species gradually changes over time |
| Adaptation | A trait that helps an organism to survive in its environment |
| Genetic Drift | A random change in a gene pool caused by chance events |
| Gene Pool | All the genes in a population |
| Radioactive Dating | A way to determine the age of a fossil by measuring the amount of radioactive elements in it |
| Relative Dating | A way to estimate the age of a fossil by comparing its position in a rock layer |
| Selective Breeding | Artificially selection (by man) of what animals will breed |
| Evidence for Evolution | 1) Fossils 2) Homologous body structures 3) Embryo development 4) DNA similarities |
