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प्रश्न
The six major biogeographical realms are separated from one another primarily by:
पर्याय
Deep river valleys
Oceanic barriers
High mountain ranges
Man-made political boundaries
MCQ
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उत्तर
After Pangaea broke apart due to tectonic plate movements, the six major biogeographical realms became separated by oceanic barriers. These barriers prevented the free mixing of flora and fauna between realms.
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