The Chesapeake Bay, which is along the coast of the Eastern U. S., is the largest estuary in the country. Many rivers, including the Potomac, empty into this section of the Atlantic Ocean. During the 1970s, areas of the bay were found to have low levels of oxygen and could not support life. What was the cause of this problem?

What finding has provided scientific evidence to support life on earth possibly evolved from microbes? a) the curiosity rover discovered warm and wet enviromental conditions on mars similar to earth. b) space probes discoverd evidence of possible extraterrestial life on other planets. c) space satellites provided pictres of prehistoric life on earth d) evidence of human fossils found in rock samples.