Question

justify, cyanobacterians are called photosynthetic bacterians​

Answer 1

Answer:

Cyanobacteria are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see. ... The other great contribution of the cyanobacteria is the origin of plants.

Answer 2

Answer:

The reason is that cyanobacteria appeared to look a lot like green algae when they were first discovered. Cyanobacteria appear coloured because they contain the photosynthetic pigments chlorophyll (green) and photocyanin (blue). That's why it is called as photosynthetic bacterians