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Micheal Guardado

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The formation of the Isthmus of Panama around 3 million years ago connected North and South America, allowing for the exchange of plant and animal species between the two continents. This event, known as the Great American Biotic Interchange, greatly impacted the distribution of organisms in both continents, leading to the spread of new species and the extinction of others.

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Q: Describe a change in geographic connections that has affected the distribution of organisms during earth's history?
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