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 fuels are made of carbon from dead plants, which sank to the bottom of swamps during the Carboniferous Period, turning into fossil fuels. Fossil fuels contain carbon â¦ because the dead plants that decayed were once part of the carbon cycle, so they consist of carbon.