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1 A natural process resulting in the evolution of organisms best adapted to the environment.
2 Random change in allele frequencies that occurs in small populations
3 Situation in which allele frequencies remain constant
4 Process by which two species evolve in response to changes in each other
5 Formation of new species
6 The independent evolution of similar features in different lineages
7 __________ effect; a change in allele frequency following a dramatic reduction in the size of a population
8 When two or more species sharing a common ancestor become more different over time
9 The gradual change in a species over time
10 __________ effect; the change in allele frequencies as a result of the migration of a small subgroup of a population
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