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Which factors can have the greatest effect on the health of a river system?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
An ecologist found that the DO in a lake was highest in February and lowest in July. What is the most likely reason that this occurred?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
If a body of water has very high pH, what can most likely be concluded?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
Which best determines the health of a lake used as a source of freshwater?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
What is the most likely reason that upwelling creates productive fisheries?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
In the United States, which is responsible for ensuring the safety of the country’s drinking water?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
In which oceanic zone do clams and crabs survive by burrowing in the sand?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
What is the most likely reason that nitrate levels affect the health of rivers?
nitrate levels and turbidity
There were higher temperatures in July and lower temperatures in February
Environmental Protection Agency (EPA)
It lowers the pH
High nitrate levels cause eutrophication
It is unsafe to drink
its temperature and pH
intertidal
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