Читать книгу Igbo History Hebrew Exiles of Eri - Omabala Aguleri - Страница 15

Early Hominid spread into different environments and by the end of the Pleistocene era, Homo sapiens (occupying both the old and new worlds Australia, New Zealand, and the Pacific Islands) had been sufficiently differentiated into six major races: the Australoid, the Caucasoid, the Mongoloid, the Negroid the Pymoid and the Sanoid. Each race is a human population that is sufficiently in-bred to have a distinctive genetic composition shown in a distinctive combination of physical traits. Racial differences were a result of man occupying different environments and adapting to the new situation. Adaptation was made possible by gene mutation, natural selection, genetic drift and population mixing of hybridization.