Describe how the chemical bonds in unsaturated fatty acids make them healthier for blood vessels than saturated fatty acids. Please Help

Which of the following systems in absorbing oxygen and releases carbon dioxide

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 which of the following relationships is one organism always benefited while the other organism is always harmed