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natural selection
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SC CH 7-8
Stack #213375
| Question | Answer |
|---|---|
| adaptation | When animals change behavior or appearance over time in response to environment. |
| natural selection | Process in which individuals that are better adapted to their environment survive and reproduce more successfully than others do. |
| Why can many insects adapt quickly to insecticides? | The insects generation time is short. |
| What evidence of natural selection is available today that was not available to Darwin? | Differences in genes create variation. |
| Evolution | The process by which populations slowly change over time. |
| speciation | A process that begins when a portion of a population becomes physically or geographically isolated. |
| trait | A specific characteristic that can be passed from parent to offspring. |
| What process would farmers use to produce vegetation that will grow in a specific climate? | selective breeding |
| selection | When certain genes make organisms more likely to survive and reproduce. |
| If two organisms have similar traits and DNA, they probably share a what? | ancestor |
| fossil | The remains or imprint of a once-living organism found in layers of rock. |
| Populations are limited by what? | starvation, disease, competition, and predation |
| What are the four parts of natural selection? | overproduction, inherited variation, struggle to survive, and successful reproduction. |
| speciation | Process of separation, adaptation, and division. |
| species | A group of organisms that can mate with one another to produce fertile offspring |
| fossil record | A timeline of life provided by the remains of imprints of dead organisms. |
| whales | Modern ocean-dwelling mammals that are descended from ancient land-dwelling mammals. |
| Charles Darwin | A naturalist who proposed that evolution happens through natural selection. |
| population | Grpups of individuals of the same species living in the same place. |
| genetics | Modern knowledege that helps explain Darwin's theory. |
| Darwin could not answer all of the questions regarding his new theory because he did not know about what? | genetics |
| inherited variation | When an organism's offspring is not identical to it. |
| Minerals seeping inot an organism's remains forms what? | fossils |
| Why is the Earth's fossil record incomplete? | Specific conditions are required for fossils to form. |
| What evidence supports the theory that whales evolved from land-based mammals? | Unused hip bones, whales are mammals, and the fossil record. |
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tuck