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Science Chapter 5
| Question | Answer |
|---|---|
| adaptation | a characteristic that helps an organism survive in its environment. |
| species | the most specific of the 7 levels of classification; characterized by a group of organisms that can mate with one another to produce fertile offspring. |
| evolution | the process by which populations accumulate inherited changes over time. |
| fossil | the solidified remains or imprints of a once-living organism. |
| fossil record | a historical sequence of life indicated by fossils found in layers of the Earth's crust. |
| vestigial structure | the remnant of s once-useful anatomical structure. |
| generation time | the period between the birth of one generation and the birth of the next generation |
| speciation | the process by which 2 populations of the same species become so different that they can no longer interbreed. |
| trait | a distinguishing quality that can be passed from one generation to another. |
| selective breeding | the breeding of organisms that have a certain desired trait (artificial selection) |
| natural selection | the process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait. |
| mutation | a change in the order of the bases in an organism's DNA: deletion, insertion, or substitution |
Created by:
soconnor
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