what is cyanobacteria.an what are ther examples.what are actinomycetes

a divison of microorganisms , that are capable of photosynthesis and are undergo in the division of microorganisms . 
they are prokaryotic and represent the earliest form of earth . 
actinomycetes are one type of bacteria , thses bacteria are mainly gram possitive bacteria , 
tthey are teristrial and aquatic , they have a great economic importance to that of humans . 
HOPE IT CLEARS ..