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21 Cards in this Set
- Front
- Back
Evolution |
The process of change by which new species develop from preexisting species over time; at the genetic level, the process in which inherited characteristics within populations change over time; the process defined by Darwin as " descent with modification. |
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Artificial selection |
The human practice of breeding animals or plants that have certain desired traits. |
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Natural selection |
The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do; a theory to explain the mechanism of evolution. |
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Adaptation |
The process of becoming adapted to an environment; an anatomical, physiological, or behavioral change that improves a population's ability to survive. |
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Fossil |
The trace or remains of an arganism that lived long ago, most commonly preserved in sedimentary rock. |
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Homologous |
Describes a character that is shared by a group of species because it is inherited from a common ancestor. |
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Speciation |
The formation of new species as a result of evolution. |
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Population genetics normal |
The study of the frequency and interaction of alleles and genes in populations. |
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Distribution |
The relative arrangement of the members of a statistical population; usually shown in a graph. |
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Genetic equilibrium |
A state in which the allele frequencies of a populations remain in the same ratios from one generations to the next. |
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Reproductive isolation |
A state on which a particular set of populations can no longer interbreed to produce future generations of offspring. |
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subspecies |
A taxonomic classification below species that groups organisms that live in different geographical areas, differ morphological from other populations of the species, but can interbreed with other populations of the species. |
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Diverenge |
Splitting off of two species. |
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Speciation |
The formation of new species as a result of evolution. |
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Species |
A group of organism that are closely related and can mate to produce fertile offspring so the level of classification below genus and above subspecies. |
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Extinction |
The death of every member of a species. |
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Genetic equilibrium |
A state in which the allele frequencies of a population remain in the same ration from one generation on the next. |
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Gene Flow |
The movement of genes into or out of a population due to onterbreeding |
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Gene Drift |
The random change in allele frequency in a population. |
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Stabilizing Selection |
A type of natural selection in which the average form of a trait is favored and becomes more common. |
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Disruptive Selection |
A type of natural selection in which two extreme forms of a trait are selected. |