In which of the following does the process of natural selection produce change ? A: individual member of species
B: organisms that reproduce asexually only
C: population of species
D: animal species only

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