Speciation - It occurs when populations of the same species become isolated, either geographically or reproductively, and undergo genetic changes over time, Allopatric - Due to geographic separation, Sympatric - Within the same environment, peripatric - In small isolated populations, Example of allopatric - Finches in Galapagos Islands, Example of Sympatric - Lake Victoria cichlid, Example of peripatetic - Polar bears, Richness - Number of different species in a given ecosystem, evennes - Describes how individuals are distributed among those species,

Speciation

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