Nitrogen fixation is a process that makes nitrogen available to plants and is carried out by ________
A) parasitic bacteria
B) nitrogen gas dissolving in fresh water and in the ocean
C) plants during photosynthesis
D) volcanic eruptions
E) mutualistic and free-living bacteria
Answer: E
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We can ignore the temporary consequences of a warmer global climate because much of the recent warming is due to natural glacial and interglacial cycles.
Answer the following statement true (T) or false (F)
Why does oxygen have such a low solubility in water?
A. Water's attraction for itself is stronger than its attraction for oxygen molecules. B. Water and oxygen only attract one another by means of weak dipole-induced dipole attractions. C. The hydrogen bonding in water keeps the oxygen solubility low. D. Both A and B are true.
A significant drawback to wind power is
A) the turbines obstructing the landscape. B) the novelty of windmill technology raises the risk. C) the cost of the turbines requires significant capital investment. D) oil companies discourage it. E) there are only a few areas on the globe that would benefit.
The most costly hurricane ever to hit the United States was Hurricane
a. ?Ivan. b. ?Katrina. c. ?Wilma. d. ?Andrew. e. ?Camille.