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.
Most often the term monomer refers to the organic molecules which form synthetic polymers, such as, vinyl chloride, which is used to produce the polymer polyvinyl chloride (PVC).The process by which monomers combine end to end to form a polymer is called polymerization.