What are fossils? a. molds and casts of organisms that live today b. drawings of ancient animals and other organisms c. footprints or burrows of small animals that live today d. the preserved remains or traces of organisms that lived in the past

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