Have the ability to fix atmospheric nitrogen.
pathogens
rickettsia
cyanobacteria
streptococcus

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. 

The 3 steps are vasoconstriction, temporary blockage of a platelet plug, formation of a fibrin clot better known as coagulation.

It forms into a full nebula/star