मानव जनसंख्या वितरण, घनत्व और विकास की विशेषताओं और प्रतिरूपों के अध्ययन को ______ कहा जाता है।

In traditional anthropological classification of human races, which racial group was characterized as 'yellow-skinned'?

What is the approximate estimated proportion of ecumene (habitable) and non-ecumene (uninhabitable/sparsely inhabited) areas on the Earth's surface?