Examlex
What are organizations formed with the purpose of raising and spending money in order to influence elected officials called?
Punctuated Equilibrium
Model of evolutionary change in a species which suggests that there are long periods of little or no change, followed by brief periods of rapid speciation.
Phyletic Gradualism
Phyletic gradualism is an evolutionary model suggesting that species evolve through a gradual change of populations over long periods of time.
Speciation
The evolutionary process by which new biological species arise.
Isolating Mechanisms
Biological features or behaviors that prevent species from interbreeding, thus maintaining species boundaries and genetic integrity.
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