Blood Types. Distinct molecules called agglutinogens (a type of antigen) are attached to the surface of red blood cells. There are two different types of agglutinogens, type A and type B.
Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. In common dialogue, the term fossil fuel also includes hydrocarbon-containing natural resources that are not derived from animal or plant sources.
Fossil fuel. Definition. noun. (1) Any fuel formed from hydrocarbon deposits (e.g. coal, petroleum or oil, natural gas, etc .) or fossilized remains of organism (hence the name).(2) A solid, liquid or gaseous fuels formed after millions of years by chemical and physical changes in plant and animal residues under high temperature and pressure.efinition. noun. (1) Any fuel formed from hydrocarbon deposits (e.g. coal, petroleum or oil, natural gas, etc .) or fossilized remains of organism (hence the name).