Speciation. A species is an interbreeding group of organisms When a population is somehow severed from the parent population and over time its gene pool is altered. Allopatric and sympatric. Allopatric speciation. Isolation is the result of a geographic barrier Ex. Galapagos finches
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Ex. Western spotted skunks breed in fall, while eastern spotted skunks breed in the late winter
Ex. Some Garter snakes live in water/some on land
Ex. Insects and flowers