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19 Cards in this Set
- Front
- Back
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Evolution |
The development of new types of organisms from preexisting types of organisms over time |
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Natural Selection |
The mechanism for descent with modification |
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Adaption |
A trait that makes an individual successful in its environment. |
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Fitness |
a measure of an individual's hereditary contribution to the next generation. |
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Strata |
rock layers |
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Fossil |
the remains or traces of an organism that died a long time ago |
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Superposition |
if the rock strata at a location have not been disturbed, the lowest stratum was formed before the strata above it. |
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Relative Age |
a fossil's age compared to that of other fossils |
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Absolute Age |
the estimate time since formation |
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Biogeography |
the study of the locations of organisms around the world. |
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Homologous Structure |
anatomical structures that occur in different species and that originated by heredity from a structure in the most recent common ancestor of the species |
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Analogous Structures |
Anatomical structures that occur in different species but do not come form the same ancestral structure. |
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Vestigial Structure |
Anatomical structures that seem to serve no purpose but that resembles structures with functional roles in related organisms. |
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Phylogeny |
the relationships by ancestry amoung groups of organisms |
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Convergent Evolution |
the process by which different species evolve similar traits |
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Divergent Evolution |
a process in which the descendants of a single ancestor diversify into species that each fit different parts of the environment |
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Adaptive Radiation |
When a new population in a new environment will undergo divergent evolution until the population fills many parts of the environment |
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Artificial Selection |
A process when humans choose the individuals that will parent the next generation |
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Coevolution |
When two or more species have evolved adaptions to each other's influence |
