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26 Cards in this Set
- Front
- Back
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Behavioral Isolation
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Species unable to interbreed because they have different courtship rituals
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Genetic Drift
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Random change in alleles that occur in a small populations
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Homologous Structure
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Structures that developed from a common ancestor and show evolutionary structure
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Adaptive Radiation
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Type of EVOLUTION where one species has evolved into many
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Directional Selection
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Type of SELECTION where an extreme trait is favored and the other extreme trait is selected against
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Natural Selection
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Process of change that happens quickly and only affects a single individual
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Half-life
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Time it takes half of a substance to loose its radioactivity
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Gene Pool
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All the traits possible in a population
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Punctuated Equilibrium
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Evolutionary pattern where long stable periods of little change are interrupted by periods of rapid change
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Reproductive Isolation
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Speciea unable to interbreed because they are no longer physically compatible
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Adaptation
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Organism changing in some way to better fit its enviorment through a change in structural, functional, or behavioral traits
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Geographical Isolation
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Species unable to interbreed because they are physically separated
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Disruptive Selection
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Type of SELECTION where 2 extreme traits are favored and the average trait is selected against
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Speciation
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Creating a new species through geographic or reproductive isolation
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Coevolution
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Species that interact changing together over a long period of time
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Relative Dating
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Determining the age of a fossil by examing neighboring layers
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Vestigial Organ
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Structure that is no longer needed for survival
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Fitness
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An organism's ability to survive and reproduce
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Genetic Equilibrium
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Constant allele frequencies
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Stabilizing Selection
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Type of SELECTION that favors an average trait and selects against extreme traits
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Analogous Structure
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Structure developed for the same function; no evolutionary relationship
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Temporal Isolation
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Species unable to interbreed becuase they have different breeding seasons
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Radioactive Dating
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Technique used by scientist to date samples based on its level of natural radioactivity
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Evolution
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Changes in a population over long periods of time
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Convergent Evolution
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Types of EVOLUTION where 2 unrelated species change to have similar structures
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Cladogram
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Graphic organizer that shows similar characteristics of organisms
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