Question

Cyanobacteria is a bacteria or an algae ?​

Answer 1

Explanation:

cyanobacteria are also known as blue green algae

so i think they are algae and photosynthesis also takes place

Answer 2

Answer: These are also referred to as blue-green algae. Though they are capable of conducting oxygen-producing photosynthesis and live in many of the same environments as eukaryotic algae, cyanobacteria are gram-negative bacteria, and therefore are prokaryotes.