Select all that apply. Which of the following are examples of early technology? the plow
systems of communication
taxes
temples to worship gods
the Fertile Crescent

Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

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How many structures do prokaryotic cells have in common with the eukaryotic cells? a. 2b. 3c. 4d. 5