Which field in Biology studies chemical processes within and relating to living organisms ?
Geochemistry – study of the mechanisms behind major geological systems using chemistry * Aqueous geochemistry – study of the role of various elements in watersheds , including copper , sulfur , mercury , and how elemental fluxes are exchanged through atmospheric - terrestrial - aquatic interactions * Isotope geochemistry – study of the relative and absolute concentrations of the elements and their isotopes using chemistry and geology * Ocean chemistry – studies the chemistry of marine environments including the influences of different variables .