Anaerobic degradation of organic material in water systems occurs in the absence of
A) dissolved oxygen.
B) dissolved nitrogen.
C) nutrients.
D) sunlight.
Correct Answer:
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Q19: The saltiness of the oceans is
A)decreasing slowly.
B)increasing
Q20: What percentage of water on the earth
Q21: Dissolved oxygen is added to streams and
Q22: Aerobic decomposition of organic matter requires
A)oxygen.
B)nitrogen.
C)magnesium.
D)water.
Q23: Pathogenic is
A)disease-causing.
B)an antibiotic.
C)a cure for a disease.
D)a
Q25: Which part of the water supply is
Q26: Which company's industrial waste water would have
Q27: As the amount of organic material in
Q28: The effects of acid rain include all
Q29: Biochemical oxygen demand (BOD)is a measure of
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