Science nutrient pollution causes algal blooms and fish kills. question 2 options: true false save question 3 (1 point) question 3 unsaved in normal ecosystem low nutrient levels keep algae in check. question 3 options: true false save question 4 (2 points) question 4 unsaved which of the following contributes to excess nutrients entering the bay? question 4 options: sewage run-off not recycling agricultural run-off air pollution save question 5 (2 points) question 5 unsaved in order to get phase 2 to turn blue (like we saw in phase 1), did we need more or less drops of reagent d than what we used in phase 1? question 5 options: more less save question 6 (2 points) question 6 unsaved which stage of of the experiment had the most dissolved oxygen in the water? question 6 options: phase 1 phase 2 phase 3