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A. live in flexible social groups
B. are knuckle walkers
C. are closely related to bonobos
D. all of these
D. all of these
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The global spread of humans from their African origins was made possible by __________
a. the end of the Ice Age b. the capacity for culture c. the extinction of large predators outside Africa d. a land bridge from Asia to North America
Which of the following statements about techniques used in dating fossil remains is NOT true?
A. The potassium-argon technique is used to date inorganic substances such as rock. B. Carbon-14 techniques are used to date organic material. C. Potassium-argon dating is most accurate on specimens over 500,000 years old. D. Carbon-14 dating is most accurate on specimens more than 70,000 years old. E. Electron spin resonance is used to date rocks and minerals between 1,000 and 1,000,000 years old.
The competitive feast of the Kwakiutl at which chiefs distribute and destroy goods to validate their claims to prestige is called a(n) __________
Fill in the blank(s) with correct word
Omo, like Olduvai
A) has deep-cut, riverbeds B) is part of the rift valley C) has had volcanic activity D) all of the above E) none of the above