The greatest source of both nitrogen and phosphorus entering Chesapeake Bay is ________
A) urban fertilizer runoff
B) agriculture
C) municipal and industrial wastewater
D) septic systems
E) natural sources
B
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Which of the following terms refers to the bending of light that occurs when it enters and passes through a substance of different density?
A. scattering B. diffraction C. reflection D. refraction
The marine fauna that repopulated the oceans after the Permian extinction was more diverse than the Paleozoic marine fauna
Indicate whether the statement is true or false
Which of the following is a major anthropogenic source of volatile organic compounds (VOCs)?
A) Coal-fired electrical generating plants B) Agricultural fertilizers C) Incompletely combusted fossil fuels from vehicle exhaust D) Nuclear power plants
The South Asia realm was the birthplace of two of the world's great religions, Islam and Buddhism.
a. true b. false