8956
Some populations became isolated for periods of time , developing in different directions , but through continuous interbreeding , replacement , genetic drift and selection , adaptations that were an advantage anywhere on earth would spread , keeping the development of the species in the same overall direction while maintaining adaptations to regional factors .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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