Biogeographic realms, also known as biogeographic regions, are large areas of the Earth that are characterized by distinct biological communities and ecosystems. These realms represent the patterns of biodiversity and the distribution of species across the globe, often shaped by historical, geographical, and environmental factors. Biogeographic realms are typically classified based on the following criteria: 1. **Flora and Fauna**: Each realm contains specific plant and animal species that have adapted to its unique environment.
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