________ was/were domesticated from wild species in more northerly subhumid regions of East Asia
A) Rice
B) Tea
C) Soybeans
D) Wheat
E) none of the above
Answer: C
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The oceans absorb CO2 from the lower atmosphere, which in turn creates carbonic acid. Should humans be concerned about this ocean acidification?
A. No; because carbonic acid is an ingredient in soft drinks, it is not dangerous. B. No, because the oceans have such a large volume, that increases in carbonic acid don't have a major affect. C. No, because carbonic acid is consumed by organisms in the ocean before it can do harm. D. Yes, because the increasing acidification means oceans will be unsafe for humans to swim in. E. Yes, because ocean acidification inhibits the growth of shelled organisms and decreases phytoplankton populations.
Which of the following is a good method to reduce soil erosion as a result of strong winds?
A) Planting grass in natural drainageways B) Creating terraces on steep slopes C) Planting rows of trees and shrubs D) Plant rows for crops that are oriented straight up the slope
Alfred Wegener used paleoclimate data to support his continental drift hypothesis. What was the alternative explanation to a different distribution of Earth's climates, e.g., Antarctica has sedimentary rocks that were deposited in swamps?
A. Ocean currents were very different. B. The positions of the geographic poles had wandered. C. Earth was much closer to the Sun. D. There was no alternative explanation.
Which one of the following would most likely be covered with thick turbidite layers?
A) ocean floor around a conical-shaped seamount B) upper part of a steep, narrow, submarine canyon C) axial rift zone of an active mid-ocean spreading center D) deep-sea fan at the base of a continental slope