Question

_____ have the ability to fix atmospheric nitrogen.

Pathogens
Rickettsia
Cyanobacteria
Streptococcus

Answer 1

The correct answer is 3. Cyanobacteria

Answer 2

Cyanobacteria

Cyanobacteria are microorganisms that have survived for a thousand years now. They process and create their food through the photosynthetic mechanisms they possess and this process also includes nitrogen fixation and other biogeochemical process that contributes to most cycles.