Pepsin is produced in the stomach and breaks some of the peptide bonds in polypeptide chains.
Answer:
it lets the defuse faster, which allowed communication to go by in a quickly manner
Explanation:
Although amino acids may have other formulas, those in protein invariably have the general formula RCH(NH2)COOH, where C is carbon, H is hydrogen, N is nitrogen, O is oxygen, and R is a group, varying in composition and structure, called a side chain.
I think it would be the third one
Answer:
Birds have remarkably specialized bones that are pneumatic, because they are full of air sacs that provide a continuous flow of breath throughout their bodies. In short, their lungs are essentially hooked up to their bones.
