Recent DNA analysis of Australian aborigines has revealed that their ancestors branched off from ancestral Europeans and Asians 70,000 to 50,000 years ago. This research indicates
A. aborigines developed a dark skin color independently from Africans.
B. Australian aborigines are direct descendants of the first modern humans to leave Africa.
C. aboriginal Australians have a more recent population history than Europeans.
D. aborigines maintained regular contact with people from other continents.
E. ancestral aborigines had cultural but not genetic isolation.
Question 2
Which of the following statements about the concept of race as applied to humans is true?
A. It is a discredited concept in biology.
B. It is based on the Western science of genetics.
C. It is determined by the juxtaposition of alleles.
D. It does not include what used to be called subraces, because these are now known as ethnic groups.
E. It has been verified by recent fossil finds in the Neander Valley in Germany.
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