| A | B |
|---|
| Evolution | a gradual change in a species over time |
| fossils show . . . | old species that have become extinct (MUST have been living) |
| Living things have become (more or less) complex over time. | MORE |
| Adaptations | traits that help an organism survive & reproduce |
| Example of adaptation | polar bear has white fur |
| If an organism does not adapt to environmental changes it will ___________ | become extinct |
| Mutation | sudden change in a gene |
| What is another name for the theory of evolution | Natural Selection |
| Charles Darwin | developed the theory of evolution |
| Natural Selection | process by which individuals that are better adapted to the environment survive |
| Overproduction | each species create MORE offspring than can survive (not enough living space or food) |
| Competition | offspring compete for their basic needs, only a few will survive and reproduce |
| Variation | differences between members of the SAME species |
| Survival of the fittest | variations make individuals better suited for living and are more likely to survive |
| Evolution of a New Species | the individuals that survive in a species will pass on their helpful traits and the unfavorable (harmful) traits will die out. Over many generations this can become a new species. |
| Evolution occurs | gradually |
| What helps an organism survive? | Adapting to environmental changes |
| Fossils are most commonly found in | sedimentary rock |
| Organisms that evolve quickly are _____. | only one cell like bacteria |
| Sedimentary rock | type of rock that fossils are usually formed |
| The oldest fossils are found on (top or bottom) of sedimentary rock layers | bottom |
| Types of fossils | footprints, frozen organisms, insects preserved in amber, buried parts |
| "Homo sapiens" is latin for | wise human |
| species | group of organisms that can mate and produce fertile offspring |
| fossils | preserved remains of organisms that lived in the past |
| extinct | a species that no longer has any living members |
| Competition occurs between organisms that are . . . | most closely related |
