Question: are cyanobacteria prokaryotic or eukaryotic?
Answer: 'blue'). Cyanobacteria, which are prokaryotes, are also called "blue-green algae", though some modern botanists restrict the term algae to eukaryotes. Cyanobacteria appear to have originated in freshwater or a terrestrial environment. Unlike heterotrophic prokaryotes, cyanobacteria have internal membranes.