Question: what is the difference between cyanobacteria and the rest of the algae?
Answer: Green algae are eukaryotes but, cyanobacteria are prokaryotes. Therefore, the green algae contain membrane-bound organelles along with a nucleus. ... The main difference between green algae and cyanobacteria is that green algae contain chloroplasts whereas cyanobacteria do not contain chloroplasts in their cells.