What could cause a build up of algae which would decrease the amount of oxygen available for the organisms in the river? A. protecting natural vegetation along the river.

B. factory pollution

C. erosion of the watershed

D. fertilizer run off from crops into the river

What if it is did darwin used to support his theory of evolution

Calculate the concentration of all species in a 0.165 m solution of h2co3.

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.