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21 Cards in this Set
- Front
- Back
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Preserved evidence of an organism |
Fossil |
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Amount of time it takes for half of the original isotope to decay |
Half life |
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Study of fossils |
Paleontologists |
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Record of earths history |
Geologic time scale |
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Used to determine the age of rocks by comparing them with those in other layers. |
Relative dating |
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Life arises from nonlife |
Spontaneous generation |
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Younger layers of rock are deposited in top of older layers. |
Law of superposition |
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Only living organisms can produce other living organisms |
Theory of biogenesis |
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Uses the decay of radioactive isotopes to measure the age of rock |
Radiometric dating |
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The ones that are most adapted for their environment are more likely to survive |
Natural selection |
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Changes in groups of organisms through time |
Evolution |
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Similar structures inherited from a common ancestor |
Homologus structure |
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Similar structures inherited from a common ancestor |
Homologus structure |
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Structures that reduce forms of functional structures in other organisms |
Vestigal structure |
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A measure of the relative contribution that an individual trait makes to the next generation |
Fitness |
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Used for the same purpose and can be superficially similar to construction but are not inherited from a common ancestor |
Analogous structure |
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Blending in |
Camoflauge |
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Mimicing another animal to make it seem more dangerous |
Mimicry |
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Formation of new distinct species in the course if evolution |
Speciation |
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Change in the allelic frequencies in a population that results from chance |
Genetic drift |
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Diverse group of organisms into forms filling different ecological niches |
Adaptive radiation |
