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| a change in gene patterns in a given population over time to allow a species to survive |
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| general term used to describe any remains or prints of organisms from the past |
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| the process of finding the age of a fossil by comparing it to the age of the soil layer it was found in |
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| the process of finding the age of a fossil by the amount of radioactive material still present |
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| amount of time it takes for a radioactive material to breakdown after the death of an organism |
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| the radioactive material that exists in living things |
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| this refers to the chemical make-up of DNA and other physiological material in an organism |
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| The study of the structures of the body and where they are located |
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| two different organisms that have a body part with a similar structure but the functions are different |
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| two different organisms that have a body part with similar functions but different structures |
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| physical, physiological, or behavior trait that helps an organism survive better in the environment |
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| this occurs when animals can no longer interbreed to produce fertile offspring |
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| A group of organisms that are able to interbreed and produce fertile offspring |
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| Separation of a species due to change in genetic material |
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| this occurs when a separation of species is caused by a physical barrier |
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| Separation of a species in which one species becomes extinct |
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| process of making a new species |
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| possible explanation of nature |
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| theory that the earth was created by a supreme being in a set amount of time |
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| theory that suggests that changes occur due to repeated natural events such as floods, volcanoes, meteorites, plagues, etc |
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| theory proposed by a scientist that believed that organisms gain a characteristic based on need & then pass it on to their offspring |
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| theory that states living species today are ancestors or relatives of previous species |
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