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  1. Two geographical regions separated by high mountains are
    1. Oriental and Australian
    2. Palaearctic and Oriental
    3. Nearctic and Palaearctic
    4. Neotropical and Ethiopian
Correct Option: B

Dr. P. L. Sclater, 1858 divided the world into 6-regions on the basis of distribution of birds only, later in 1876 A.R. Wallace adopted it for all the animals. These six realms (regions) support evidence of organic evolution.



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