Why do cyanobacteria possess heterocysts A Heterocysts shiel

Why do cyanobacteria possess heterocysts?

A- Heterocysts shield the organism\'s nitrogen fixation enzymes from oxygen

B-Heterocysts serve as a primitive nucleus in these bacteria

C- Bacterial photosynthetic pigments are located in heterocysts

D-Heterocysts are reproductive structures similar to endospores in other bacteria

Solution

Heterocysts are nitrogen fixing cells formed during nitrogen starvation in some cyanobacteria, hence option A is answer.