Question

Which of the following statement regarding cyanobacteria is incorrect?

• A. They are chemosynthetic autotrophs
• B. It is unicellular, colonial or filamentous, marine or terrestrial bacteria
• C. It forms blooms in polluted water bodies
• D. It is also called blue green algae

Answer 1

The correct option is A They are chemosynthetic autotrophs

The cyanobacteria (also referred to as blue-green algae) have chlorophyll a similar to green plants and are photosynthetic autotrophs.

The cyanobacteria are unicellular, colonial or filamentous, freshwater/marine or terrestrial algae. They often form blooms in polluted water bodies.

Some of these organisms can fix atmospheric nitrogen in specialized cells called heterocyst, e.g., Nostoc and Anabaena.

So, out of the given options, only statement B is incorrect about cyanobacteria.