निम्नलिखित में से कौन सी जनजाति का सम्बन्ध पारंपरिक रूप से भूमध्यरेखीय (विषुवतीय) प्रदेश से नहीं 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?