| A | B |
|---|
| species | a group of organisms whose members can successfully reproduce among themselves |
| natural selection | organisms with traits best suited to their environments are more likely to survive |
| population | a group of organisms of one species that live in an area |
| variation | the appearance of an inherited trait that makes an individual different from the other members of the population |
| camoulage | a protective adaptation that lets an organism blend into its environment |
| gradualism | the slow change of one species to another new species |
| punctuated equilibrium | that rapid evolution of species can come about by the mutation of just a few genes |
| sedimentary rock | formed by mud, sand, or other fine particles that settle out of liquid. Contains the most fossils |
| relative dating | determines the age of a fossil by looking at the rock layer it is located in. |
| radioactive dating | determines the age of a rock by comparing the amount of stable product to the amount of radioactive element |
| homologous structures | structures that are similar in origin and structure |
| vestigial structures | a body part that is reduced in size and doesn't seem to have a function |
| embryology | the study of the development of embryos |
| fossils | any remains of life from an earlier time |
| Lamark | proposed the theory of aquired characteristics |
| evolution | change in hereditary feature over time |
| extinction | the complete ddying out of a species |
| endangered species | species with so few individuals that they are in danger of becoming extinct |
| primate | group of mammals containing monkeys, apes and humans |
| Homo sapiens | wise human |
