Question

Adding nutrients to streams is beneficial to biological communities and is one way to improve water quality

Select one:

True

False

High levels of carbon dioxide and low levels of oxygen in water may indicate . . .

Select one:
a. high levels of bacterial growth
b. high water temperature
c. low levels of bacterial growth
d. a healthy stream system

High levels of nitrates and phosphates cause animals to die in streams by

Select one:

a. stimulating blooms of algae and bacteria which ultimately deplete oxygen levels in the water

b. stimulating the production of chlorine gas

c. directly poisoning fish and other animals

d. ultimately increasing oxygen production beyond critical levels

Answer 1