One way of balancing the concentration of ions and molecules within a cell is to use all but . atp transfers one of its phosphate groups (becoming adp) to a transfer protein. this protein changes its conformation so it can bring needed ions into the cell and get rid of unnecessary ions. a) cellular energy b) active transport c) membrane protein d) phospholipid channels

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