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Genetic change over time Resulting in new species There is more to evolution than change Trees change, mountains change Evolution is a change in genes that control traits in an organism Natural…Nature chooses Artificial Selection…Humans choose Natural selection has four basic principles: 1. More organism are born than can survive. 2. All of the organisms (offspring) will have genetic changes due to sexual reproduction and mutation 3. The environment doesn’t have enough resources to support all of the individuals that are born. 4. Some of these changes will be beneficial to an organism. These benefits lead to a stronger organism and these stronger traits are pass down to future generations. The environment changes A trait which is good for one environment may not be good for a different environment Brown rabbits vs. white rabbits Natural Selection: Nature chooses Conditions in nature select for traits in organism which will make that organism the most successful. Selected for…Passed on Selected against…extinct All that you see are things that humans have chosen The stuff you don’t see are items we have not selected for…they may become extinct...or retro in twenty years. Music, clothes, TV, etc. Anything “popular” has been selected for. The unpopular…not around.