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26 Cards in this Set

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