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.
The three fossil fuels are natural gas, coal, oil. They were formed  in the earth from vegetation and other organic material 300 million  years ago.he three fossil fuels are natural gas, coal, oil. They were formed  in the earth from vegetation and other organic material 300 million  years ago.