Complete the following sentences about prokaryotes.

Anaerobic prokaryotes use to obtain energy.

Archaea and eubacteria are prokaryotic in nature. One of the differentiating characteristics between them is that eubacteria have in their cell walls.

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

Under which of the following circumstances would natural selection not operate on an organism

True or false 5. carrier proteins have the ability to to change shape and physicially move molecules across the cell membrane. 6. in a facilitated diffusion, the concentration of the molecules to be moved across the cell membrane is higher inside the the cell.