Question

Which one of the followings is not the characteristic feature of cyanobacteria?

• A. They are always multicellular.
• B. They form colonies.
• C. They form blooms in polluted water bodies.
• D. They can fix atmospheric nitrogen.

Answer 1

Answer: (A)

They are always multicellular.

Cyanobacteria are unicellular prokaryotes that photosynthesise. They form huge colonies that appear as algal bloom in polluted waters. They can fix nitrogen from the atmosphere by means of specialised structures called as heterocysts.