Question
Heterocysts in Anabaena is helpful in
secondary growth
nitrogen-fixation
ion uptake
gaseous exchange
Solution
B.
nitrogen-fixation
Anabaena is free living filamentous cyanobacteria that contains many vegetative cells, which are photosynthesis and a few thick walled cells heterocytes. The latter does not contain any photosynthetic pigments and acts as the site of nitrogen-fixation.
