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17 Cards in this Set

  • Front
  • Back
Study of the patterns of distribution of species.
Scientific study of the body form and structures of major groups
Recognizable, physical evidence of an organism that lived in the distant past.
Theory of Uniformity
Theory that Earth’s surface changes in slow, uniformly repetitive ways. Helped change Darwin’s view of evolution. Has since been replaced by plate tectonics theory.
Natural selection
Microevolutionary process; the outcome of differences in survival and reproduction among individuals that differ in the details of their heritable traits.
Artificial Selection
Selection of traits among a population under contrived conditions.
Any aspect of form, function, behavior, or development that improves an individual’s capability of surviving and reproducing in a given environment.
Gene Pool
All the genes in a population.
Of a population, any change in allele frequencies resulting from mutation, genetic drift, gene flow, natural selection, or some combination of these.
Directional selection
Mode of natural selection by which forms of a trait at one end of a range of phenotypic variation are favored and all others are selected against.
Stabilizing Selection
Mode of natural selection; intermediate phenotypes in the range of variation are favored and extremes are selected against.
Disruptive selection
Mode of natural selection by which forms at both ends of the range of phenotypic variation are favored and intermediate forms are selected against.
Genetic drift
Random change in allele frequencies over time brought about by chance alone; its effect is greatest in small populations.
A sudden, drastic reduction in population size.
Founder effect
A form of bottlenecking. By chance, allele frequencies of a few individuals that establish a new population differ from the frequencies in the original population.
Mating between close relatives.
Gene flow
Physical flow of alleles into or out of a population by immigration or emigration.