Vertisols, aridisols, oxisols, and ultisols all have in common that they
A. form in warm climates.
B. lack a well-developed A horizon.
C. are deeply weathered soils.
D. resist formation into polypedons.
Answer: A
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How many people are estimated to live in acute poverty today in developing countries?
a. 1.4 billion b. 1.4 million c. 140,000 d. 82 million e. 1.8 billion
Your feet feel warmer on a rug than on a tile floor because the rug
A) is usually warmer than tile. B) is a better insulator than tile. C) for the same mass has more thermal energy than tile. D) all of the above E) none of the above
The principle of interposition in visual perception suggests that
A. An object with an incomplete outline appears behind another. B. An object with an incomplete outline appears at the same level as another. C. An object with an incomplete outline appears in front of another.
Most countries in Southwest Asia and North Africa had achieved independence by which decade?
A) 1910s B) 1920s C) 1930s D) 1940s E) 1950s