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Evolution 19.2
Evolution Vocab Words Section 19.2
8
Biology
9th Grade
02/27/2012

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Term
Macroevolutionary Patterns
Definition
changes in anatomy, phylogeny, ecology, and behavior that take place in clades larger than a single species
Term
Background Extinction
Definition
extinction caused by slow and steady process of natural selection
Term
Mass Extinction
Definition
event during which many species become extinct during a relatively short period of time
Term
Gradualism
Definition
the evolution of a species by gradual accumulation of small genetic changes over long periods of time
Term
Punctuated Equilibrium
Definition
pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
Term
Adaptive Radiation
Definition
process by which a single species or a small group of species evolves into several different forms that live in different ways
Term
Convergent Evolution
Definition
process by which unrelated organisms independenly evolve similarities when adapting to similar environments
Term
Coevolution
Definition
process by which two species evolve in response to changes in eahc other over time
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