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LE Topic 5 Evolution
NYS Living Environment Curriculum: Evolution
| Question | Answer |
|---|---|
| Evolution | a process by which species have changed overtime |
| Extinction | occurs when ALL members of a species die out |
| Fossil record | layers of rock that show how species have changed over geologic time. The oldest specimens are farthest down |
| Genetic Variation | normal differences found among members of a species. Everyone’s DNA is different. |
| Mutation | a change in the DNA that may alter the protein that is eventually made |
| Natural selection/Survival of the Fittest | organisms with beneficial differences in their DNA survive better, reproduce better and pass their genes on to future generations |
| Overproduction(Overpopulation) | occurs when a species’ population grows larger than its carrying capacity. |
| Competition | occurs when there’s not enough resources so species have to fight for food and shelter |
| Theory | an explanation that has many experiments and data to back it up |
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etucci