Evolution and genetic variation
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Adaptation | a characteristic that helps an organism survive in its environment
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| Evolution | the process by which populations accumulate inherited changes over time
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| Fossil | solidified remains or imprints of a once living organism
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| Fossil record | a historical sequence of life indicated by fossils found in layers of the Earth's Crust
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| Vestigial Structure | the remnant of a once useful anatomical structure
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| trait | a distinguishing quality that can be passed from one generation to another
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| Natural selection | the process by which organisms with favorable traits survive and reproduce at a higher rate than those without that trait;"survival of the fittest"
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| Variation | differences that occur naturally in individuals and may affect their ability to survive, particularly when there is a change in the environment
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| Relative dating | determining whether an event or object, such as a fossil, is older or younger than other events or objects
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| absolute dating | determining the age of an object or event in years, usually by measuring the amount of unstable atoms in the sample
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| geologic time scale | the division of the Earth's history into distinct intervals of time
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| extinct | describes a species of organisms that has died out completely
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Created by:
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