read all choices. choose only one best answer.
10. all of the following describe the nature of science except
a. questions results
b. challenges accepted theories
c. expands scientific knowledge
d. relies on evidence
e. does not rely on evidence

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