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House sparrows in the northern part of North America are larger than those found in the southern regions. Which mechanism of microevolution is more likely to be responsible for this? founders effect natural
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House sparrows in the northern part of North America are larger than those found in the southern regions. Which mechanism of microevolution is more likely to be responsible for this?

founders effect
natural selection
genetic drift

User Mindparse
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natural selection because it's the same bird
User Niclas Larsson
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