I think ---
1. Relative Size<span>2. Texture Gradient</span>
After owls eat small rodents and bugs their stomach can not digest things like fur,bones, teeth and feathers. So once all the nutrition is extracted from the food the owl regurgitates the “extra indigestible material” in the form of pellets.
The answer to your question is bacteria
Ion exchange
method affect the solubility and function of protein, and proteins can be separated
on the basis of the charge they get. If pH is greater than
pI of a given protein, that protein gets
negative charge and become an anion, and when the pH
is less than the pI of that same protein, it gets positive
charge and become a cation.