Amedical equipment company is thinking of expanding by developing a higher tech version of the presently used lie-detection machines that measure perspiration, cardiovascular, and respiration changes. on which of the following systems should their research focus

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water