| A | B |
|---|
| species | a group of organisms that share similar characteristics and reproduce amongst themselves to produce fertile offspring |
| evolution | Change in inherited characteristics over time |
| natural selection | organisms with traits best suited to their environement are more likely to survive and reproduce. |
| variation | an inherited trait that makes an individual different from other members of its species |
| adaptation | any variation that makes an organism better suited to its environment |
| gradualism | slow process when one species changes to a new species |
| punctuated equalibrium | when one species succenly changes to another |
| sedimentary rock | formed from layers of sand, silt and rock compacted and cemented together- where fossils are found. |
| radiocactive element | give off a steady amount of radiation -scientists use this rock to estimate the age of a fossil. |
| embryology | the study of embryos and theri development |
| homologous | body parts that are similar in origin and structure. |
| vestigial structure | structures that don't seem to have a function- like appendix. |
| primate | Humans, monkeys and apes. |
| hominid | eat meat and plants and walk upright on 2 legs. |
| Homo sapiens | Means"wise man", modern humans elvolved from them. |
