Answer:
Please read the explanation section.
Explanation:
They are called polymers because they contain many small, repeating sub-units bonded together.
In the chemical and biological science, some small molecules make a polymer, which is a molecule. A polymer is that kind of molecule, which is the result of binding up between smaller molecules called monomers.
A monomer is a type of polymer that is resulting from the assembly of many small units that are similar in nature. A monomer has a chemical compound with repetitive structural units. A polymer is a molecule made up of a chain of similar molecules, called
E.g., DNA, glycogen, amino acid, and proteins are polymers
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D is the correct answer. -<span> A dense network of capillaries surrounds them.</span>
Capillaries are very small about 1 cell thick which makes them more suitable to exchanging gases rather than a vein or an artery.Capillaries allow the exchange of gases, nutrients and fluids by the process of diffusion between the body and the body tissues.
