Which of the following is a recent human impact on the nitrogen cycle?
A) nitrogen mining
B) the Haber-Bosch process
C) bacterial nitrification
D) introducing legumes into plant rotation
E) biological nitrogen fixation
Answer: B
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Which term refers to the number of people per unit of arable land?
A. agrodensity B. physiological density C. antidensity D. arithmetic density
How well pores are connected to allow groundwater flow is known as _____.
a.) permeability b.) porosity c.) aquifer d.) aquitard
A subsidence inversion develops when:
A) the mixing layer gets deeper. B) the air at the top of the mixing layer gets much colder. C) warming, subsiding air of an anticyclone traps the turbulent zone near the ground. D) air near the ground chills rapidly as radiation is emitted during the night.
What type of reaction occurs when malate is converted to oxaloacetate in step 8 of the citric acid cycle?
A) dehydration B) hydration C) oxidation D) reduction