Multiple choice

Which of the following is/are not a free living cyanobacteria?

(a) Nostoc (b) Oscillatoria (c) Anaebana (d) Blue green algae

  1. Only a

  2. Only b

  3. Only c

  4. Only a and d

  5. Only b and d

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is the correct answer. Anaebana is not a free living cyanobacteria. Anabaena Azollae maintains a mutually beneficial symbiotic relationship.