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Unit 5: Evolution
| Question | Answer |
|---|---|
| species | a group of similar organisms whose members can mate with one another and produce fertile offspring |
| evolution | the gradual change in a species over time |
| natural selection | the process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species |
| adaptation | a characteristic that helps an organism survive in its environment or reproduce |
| scientific theory | a well-tested concept that explains a wide range of observations |
| variation | any difference between individuals of the same species |
| fossil | the preserved remains or traces of an organism that lived in the past |
| sedimentary rock | a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together |
| fossil record | the millions of fossils that scientists have collected |
| extinct | a species that does not have any living members |
| homologous structure | body parts that are structurally similar in related species; provide evidence that the structures were inherited from a common ancestor |
Created by:
skrebbeks
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