The size of food web is limited by the number of animals included in the area.
-Pepetreefrogthe2nd
The Metric System units are milliliters and liters<span>. </span>
Lots of hand waving as is in the current field of much of molecular biology. Other than that experiments and observations. Basically the utilization of the scientific method and then trying to find the mechanism by which something occurs through even more research/experimentation.
HOPE THIS HELPS
