What is the Function of Heterocysts in Cyanobacteria Such as Anabaena

Question

What is the function of heterocysts in cyanobacteria such as Anabaena?
A) nitrogen fixation
B) sexual reproduction
C) asexual reproduction
D) photosynthesis

Accepted Answer

Heterocysts are specialized cells found in some cyanobacteria (such as Anabaena) that are capable of nitrogen fixation. They provide anaerobic conditions necessary for the function of nitrogenase enzyme, which converts atmospheric nitrogen gas into a form that can be used by the cell.