When you do an experiment and come up with something that works,
a. have a conclusion in which your hypothesis is correct
b. are doing research
c. have bias because you wanted to be right
d. are making inferences

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