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 most common fossil fuels are coal, oil, and natural gas. Peat, a very young form of coal, and oil shale are types of fossil fuel.hese fuels were formed millions of years ago from plants and animals that died and decomposed beneath tons of soil and rock. These fossil fuels are not fossils like the bones of prehistoric creatures.