I'm assuming it would be Population Density. My class never covered this subject greatly, but the definition is "Population density is a measurement of population per unit area or unit volume;" which sounds like what you are looking for.
Hope this helps!
-Payshence
D. Binary fission
- the process occurs during bacterium the single cell divides into two daughter cells that are identical
Dietary fiber which comes from plant- based foods that contain cellulose