This Chapter's "Appreciating Diversity" Segment Describes Recent DNA Analysis of Australian

question 36

Multiple Choice

This chapter's "Appreciating Diversity" segment describes recent DNA analysis of Australian Aborigines, which 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.

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Definitions:

Conditioning

The process of learning through association, where a response becomes more frequent or predictable in a given environment due to reinforcement.

Salivating

The act of producing saliva in the mouth, often triggered by the anticipation of food or the presence of certain stimuli.

Laboratory Dogs

Research animals, particularly dogs, used for scientific experiments to study disease, drug effects, and other biological processes.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without any prior learning.