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chapter 7 sci cards
| Term | Definition |
|---|---|
| adaptation | a characteristic that improves an individual's ability to survive and reproduce in a particular environment |
| species | a group of organisms that are closely related and can mate to reproduce fertile offspring |
| evolution | the process in which inherited characteristics within a population change over generations such that new species sometimes arise |
| fossil | the trace or remains of an organism that lived long ago most commonly preserved in sedimentary rock |
| fossil record | a hisatorical sequence of life indicated by fossils found in layers of earth;s crust |
| population | groups of individuals in the same place |
| sedimentary rock | Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water |
| mammals | animals that breath air, give birth to live young, and produce milk |
| naturalist | a scientist that studies nature |
| HMS Beagle | the British ship Darwin rode on |
| finches | a seed-eating songbird that typically has a stout bill and colorful plumage |
| Galapagos Islands | a group of islands in the Pacific off South America; owned by Ecuador; known for unusual animal life |
| trait | a genetically determined characteristic |
| natural selection | the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do |
| overproduction | having a lot of offspring |
| Inherited Variation | every individual has its own combo of traits. |
| Struggle to survive | not all of the offspring will survive |
| Successful reproduction | the best adapted offspring are likely to have their own kids that will survive |