Carbon is both a waste product and an energy source in cellular respiration occurring with glucose molecules and forms the base element in the cellular respiratory cycles of glycolysis and the subsequent Kreb's cycle in which glucose is transformed into energy.
I think the answer is A! i might be wrong
animals body are organized
Relative dating to determine the age of rocks and fossils. Geologists have established a set of principles that can be applied to sedimentary and volcanicrocks that are exposed at the Earth's surface to determine the relative agesof geological events preserved in therock record.