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The Holarctic realm is a
The Holarctic realm is a biogeographic realm
A biogeographic realm or ecozone is the broadest biogeographic division of Earth's land surface, based on distributional patterns of terrestrial organisms. They are subdivided into bioregions, which are further subdivided into ecoregions.
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that comprises the majority of habitats found throughout the continents in the Northern Hemisphere. It corresponds to the floristic
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