Biogeographic regions (realms) are delineated based on species assemblages and their evolutionary history.

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Biogeographic regions, also known as realms or ecozones, are defined based on the distribution of species and their evolutionary relationships. These regions are characterized by distinct species assemblages that have evolved in relative isolation from one another. This approach to delineating regions is used in biogeography, the study of the spatial patterns of life on Earth, and reflects the historical events that have shaped biodiversity across the planet.

Biogeographic Regions (Realms) Are Delineated Based on Species Assemblages and Their