Approximately what percentage of incoming solar radiation is absorbed by the oceans and continents?
A) carbon dioxide
B) methane
C) nitrous oxide
D) ozone
E) water vapor
D
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What percentage of the residents of dispersed urban areas in the United States drive alone to work every day?
A. 5% B. 16% C. 34% D. 52% E. 76%
What is the function of a steroid hormone primary messenger?
A) carry a message from one part of a cell to another part of the cell B) deliver signals from one part of the body to another C) either (a) or (b), depending on the specific hormone D) neither (a) nor (b)
Energy use
A. includes much use of biomass in developing countries. B. has been declining in much of the world. C. increased significantly in the richer countries. D. is primarily from alternative energy sources.
If you are in a boat in an estuary, when will tidal currents going out to sea be strongest?
a) When the full Moon rises b) At high tide c) At low tide d) Halfway between high tide and low tide e) Halfway between low tide and high tide