The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
Mold fossils
Cast fossils
Trace fossils
Colonization of aerobic coliform and Bacteroides
Genetic information.The main job of DNA is to carry the code for making protein.A gene is a stretch of DNA that can be read by proteins called ribosomes, and copied I to type of nucleic acid called massenger RNA.
