Which of the following traits is NOT an important precondition for the development of urban state societies?
A. agricultural diversity
B. technological capabilities
C. trade and exchange networks
D. writing systems
D
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All the original Homo erectus fossils discovered at Zhoukoudian during the 1920s and 1930s
a. are now housed in a museum in Beijing. b. disappeared during World War II. c. are kept in a small museum near Zhoukoudian. d. were destroyed in a fire in the 1970s. e. are available for study at Cambridge University.
An artifact discarded or lost by an earlier population and picked up and reused by a later population is an example of
a. a reuse process. b. a reclamation process. c. a cultural disturbance process. d. argilliturbation. e. floralturbation
________ keeps the Earth's surface warm
A. The atmosphere B. Global warming C. Ocean currents D. The hothouse effect E. The greenhouse effect
Which of the following was a characteristic of Mendel's F2 generation?
a. It had a 3:1 ratio in the expression of the original parental lines. b. Dominant and recessive traits were blended. c. It was a mating of four lines that were true-breeding. d. It exhibited the traits of hybrid plants.