| A | B |
|---|
| species | a group of organisms whose members look alike |
| evolution | change in features of a species over a course of time |
| natural selection | a theory of Charles Darwin |
| variation | traits in a species that make them different from other members of same species. |
| population | a group of organisms of the same species living together in same location. |
| gradualism | slow, steady rate of evolution. |
| punctuated equilibrium | rapid evolution |
| fossils | remains of life from an earlier period. |
| sedimentary rock | rock formed by bud, sand, or other fine particles. |
| relative dating | a method for dating fossils |
| radioactive elements | give off a form of atomic energy |
| homologus | body parts of similiar origin and struture |
| vestigial structure | body part that is reduced in size and appears to have no function |
| embryology | an orgainsm in its earliest stage of development. |
| extinction | the dying out of a species |
| endangered species | species whose population numbers are so low that they may cease to exist |
| primates | group to which monkeys, apes, and humans belong |
| hominids | eat meat, vegetables and walk upright |
| Homo Sapiens | means "wise human" |
