Which of the following statements about the biosphere is NOT true? A The biosphere is a system closed to matter. B Energy enters the biosphere in the form of sunlight. C Nutrients in the biosphere must be continuously recycled. D Matter is constantly added to the biosphere.

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