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Vocab 15.2
Terms for chapter 15 section 2
| Question | Answer |
|---|---|
| fossil | the trace or remain of an organism that lived long ago, most commonly preserved in sedementary rock |
| superposition | a principal that states that younger rocks lie above older rocks if the layers have not been disturbed |
| relative age | the age of an object in relation to the age of other objects |
| absolute age | the numeric age of an object or event, often stated in years before the present, as estabolished by an absolute-dating process, such as radiometric dating |
| biogeography | the study of the geographical distribution of living organisms and fossils on earth |
| homologous structure | anatomical structures in one species that, compared to other anatomical structures in other species, originated from a single anatomical structure in a common ancestor of two species |
| analogous structure | an anatomical structure in one species that is similar in function and appearance, but not in evolutionary origin, to another anatomical structure in another species |
| vestigial structure | a structure in an organism that is reduced in size and function and that may have been complete and functional in the organism's ancestors |
| phylogeny | the evolutionary history of a species or taxanomic group; the relationship by ancestry among species or taxanomic groups |
Created by:
SheaM16
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