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 formed by photosynthesis in anaerobic organisms and plants which used the Sun's energy to split carbon dioxide into carbon and oxygen. The age of the organisms and their resulting fossil fuels is typically millions of years and sometimes exceeds 650 million years.ossil fuels were formed from prehistoric plants and animals that lived millions of years ago. When these living things died, they decomposed and got buried under the layers of mud, rock and sand. Millions of years passed and the dead plants and animals slowly decomposed into organic material and fossil fuels.