The diving bell spider stores air underwater in a net of silk explain how this could be more advantageous than having gills

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

Which structure in the cardiovascular system connect arteries to veins?

Who discovered tuberculosis bacteria?