Atricky question with no single right in maintaining the functional shape of an enzyme, are the non-covalent interactions or covalent bonds stronger?

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

Why do we perceive objects as retaining their brightness under different lighting levels?

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?