What are the three parts to a feedback loop?

How does the study of genetic disorders such as pku biologists understand normal alleles?

This is the process of making a prediction based on the results of prior observations of similar events.

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