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Question : There are two opposing views about origin of modern man. According to one view Homo erectus in Asia was ancestor of modern man. A study of variations of DNA, however suggested African origin of modern man. What kind of observation on DNA variations could suggests this

Answer»

Greater variation in Asia than in AFRICA
Greater variation in Africa than in Asia
Similar variation in Africa and Asia
Variation only in Asia and no variation Africa.

Solution :K-T Boundary. Boundary between rock sof cretaceous and tertiary periods, about 65 million years,often having iridium and marking the EXTINCTIONS of DINOSAURS.


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