1. Material in the cytoplasm of a eukaryotic cell used to form microtubules. Starts with a C 2. Cells without nuclei, consist of archaea & bacteria domans. 3. A chemical reaction that releases energy; the energy produced from reactants. (2 Words) Starts with an E 4. An organism that using inorganic chemicals as the source of energy for the formation of its organic compounds from CO2, with out using light energy. 5. The ability of living things to keep conditions inside the body constant.