Which phrases describe radioactive elements? check all that apply. occur in nature decay at a constant rate have a consistent number of particles have a half-life that determines their rate of decay release energy and particles to maintain radioactivity

Match the description of each organism to the appropriate category

During convection, less dense fluid rises and denser fluid sinks.

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