Biology, 07.07.2019 23:20 bethzabezarahi

A. as you move away from the sewage spill, the demand for oxygen falls and then rises. b. the more raw sewage present, the less demand for oxygen. c. when the dissolved oxygen is less than 4 gm/liter of water fish cannot live and the dissolved oxygen will continue to fall. d. none of the above is true.

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