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 fuelsâincluding coal, natural gas, and oilâare formed from the fossilized remains of prehistoric plants and animals, and fossil fuels provide about 95% of the world's total energy.ossil fuelsâincluding coal, natural gas, and oilâare formed from the fossilized remains of prehistoric plants and animals, and fossil fuels provide about 95% of the world's total energy.