Every organism needs energy to survive. A process in which oxygen is combined with the breakdown of sugar (glucose) molecules, releasing energy and giving off carbon dioxide and water, is known as which of the following reactions? A. Transpiration

B. Cellular respiration

C. Carbon fixation

D. Photosynthesis

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls