Footprints preserved in 3.6 million-year-old volcanic ash at Laetoli, Tanzania, indicate that
A. some of our early ancestors may have worn crude sandals.
B. A. africanus was on his/her way out of Africa.
C. A. boisei and A. africanus both lived about 3.6 million years ago.
D. A. afarensis was quadripedal.
E. bipedalism definitely preceded marked brain expansion in human evolution.
E
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The ________ researcher has traditionally studied small, non-Western populations.
A. sociologist B. ethnographer C. economist D. limnologist E. palynologist
In the study of the evolution of true lemurs and lorises, which of these factors took place?
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________ operates when an individual living in a social group takes risks for other group members and they reciprocate when the time comes
Fill in the blank(s) with correct word