Columbian Exchange and Ecological Change · US History

Which of the following best summarizes the long-term ecological impact of the Columbian Exchange?

  1. The restoration of the world to its pre-human state
  2. The homogenization of the world's biological landscapes
  3. The complete separation of the Eastern and Western Hemispheres
  4. The end of all global trade and migration
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Correct answer: The homogenization of the world's biological landscapes

The exchange broke down millions of years of biological isolation. This led to a more uniform global environment as the same species of plants and animals became established on both sides of the Atlantic.

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