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Natural Selection
| Term | Definition |
|---|---|
| artificial selection | humans choosing traits to favor - dog breeds |
| diversity | more than one version of traits in an organism |
| gene flow | DNA moving into or out of an area as individuals migrate |
| gene frequency | how often alleles (2 letters of genes) occur in the population |
| genetic drift | a random change in gene frequency - a hurricane kills a lot of individuals so the diversity of genes changes |
| mortality rate | how many individuals die in a time frame |
| natural seelction | environment favoring one version of a trait over another - one is more "fit" than the other |
| adaptation | a characteristic developed in a population over time - like the long neck of a giraffe |
| competition | organisms trying to get the same resource at the same time |
| environment | conditions in which an organism lives - the biotic and abiotic factors |
| habitat | house |
| niche | job |
| offspring | babies produced by parents |
| population | members of the same species living in an the same area at the same time |
| predator | hunts and eats organisims |
| prey | organism being hunted and eaten |
| reproduce | make more of that type of organism |
| species | organisms of the same kind that can produce offspring |
| survive | organisms that stay alive |