In a decomposition zone of water,
A) the DO (Dissolved Oxygen) level falls rapidly but most fish can survive
B) the DO (Dissolved Oxygen) level rises rapidly but most fish can survive
C) the DO (Dissolved Oxygen) level falls rapidly and only fairly hardy fish such as catfish and carp can survive
D) none of these
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Q8: Discharge of one or more water pollutants
Q9: Eutrophication is the
A)overgrowth of algae in lakes
Q10: From a global perspective, the largest contamination
Q11: Groundwater (from wells), unlike surface water, can
Q12: Groundwater (from wells) may contain
A)salt from use
Q14: Lakes generally evolve naturally over time in
Q15: Lead enters drinking water primarily from
A)improperly discarded
Q16: Mercury poisoning can occur from consuming fish
Q17: Of the ions found in water, the
Q18: Primary sewage treatment is focused on
A)reducing the
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