Which of the following was the first Chinese state that developed in the wheat-producing regions of the north?
A. Longshang
B. Chin
C. Nok Nok
D. Shang
E. Taipei
Answer: D
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In 1987, a group of molecular geneticists at the University of California at Berkeley offered support for the idea that anatomically modern humans arose fairly recently in Africa, then spread out and colonized the world. The geneticists analyzed genetic samples of 147 women whose ancestors came from Africa, Europe, the Middle East, Asia, New Guinea, and Australia. By estimating the number of
mutations that had taken place in the mithochondrial DNA (mtDNA) of each of these samples, the researchers concluded that A. everyone alive today has mtDNA that descends from a woman (dubbed "Mitochondrial Eve") who lived in sub-Saharan Africa around 200,000 years ago and that her descendants left Africa no more than 135,000 years ago. B. everyone alive today has mtDNA that descends from a woman (dubbed "Mitochondrial Eve") who lived in Asia around 50,000 years ago and that her descendants left Asia 100,000 years ago. C. establishing a "genetic clock" to model human evolution is reliable only when focusing on 50,000 years into the past. D. everyone alive can count the Neandertal of western Europe as their ancestor. E. Neandertals coexisted with modern humans in the Middle East for at least 2,000 years.
Anthropologist Ruben Andersson's study of migrants concludes that
A. migration needs to be normalized and "unfenced." B. high-tech border control systems, including razor-wire fences, are necessary to keep migrants away. C. the current system of deterrence in the EU is effective in stopping illegal migrants. D. all borders should be eliminated. E. more law enforcement is needed at border crossings.
Which of the following tools would you NOT expect to find frequently in an agricultural society?
a. Irrigation systems b. Draft animals c. Complex technology d. Digging sticks
At its current output level, Pretty Flowers Florist has average fixed costs equal to $4.40 and average variable costs equal to $2.20. What is Pretty Flowers Florist's average total cost at their current output level?
A) $2.20 B) $6.00 C) $4.40 D) $6.60