Which polymers carry the information for cell growth and reproduction from one generation to the next

Isotopes of the same element have differ in their

How does science influence the decisions made about social, economic, and political issues?

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