How does the cell wall protect a plant cell?

What materials must dams have to produce electricity, and what must occur?

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

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.