Dark Stool: If your stool is black or bright red in color, it can mean that you are bleeding internally, as a possible result of an ulcer or cancer, and warrants a call to your doctor even if you think it could be hemorrhoids, or tiny tears in the anal tissue, due to constipation and straining.
The chemical reaction in which high molecular mass molecules are formed from monomers is known as polymerization. There are two basic types of polymerization, chain-reaction (or addition) and step-reaction (or condensation) polymerization.
Polymerization. the process of producing macromolecular substances in which polymer molecules (macromolecules) are formed by the successive addition of low-molecular-weight substances (monomers) to the reactive site at the end of the growing chain. polymerisation. the act or process of forming a polymer or copolymer, esp a chemical reaction in which a polymer is formed.