Fill in the blank to complete each statement. The land that supplies water to a river system is called a___
Pollution from a single, identifiable source is called
source pollution
Pollution that is difficult to link to a particular origin is called source pollution

Watershed, Point, Nonpoint

I hope this helped good luck!

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.