Means that the effect of an exposure on an outcome has been distorted by an extraneous factor that has entered into the exposure-disease association.

Starting at the smallest, most simple level and working your way up to the most complex, explain how the following terms are connected. note-these terms are not in order molecules, atoms, organism, tissues, cells, organ systems, organs

What goes in and out of a cell respiration?

How are fossils most commonly formed