Which element (kind of atom) is present in proteins and carbohydrates, but not in water?

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

In the practice of science, this type of reasoning is used to develop explanations.

Which characteristics are typical of a human population in the postindustrial stage?