…a division of microorganisms that are related to the bacteria but are capable of photosynthesis. They are prokaryotic and represent the earliest known form of life on the earth…
…a microorganism composed of beaded filaments that aggregate to form a gelatinous mass, growing in water and damp places and able to fix nitrogen from the atmosphere…
…filamentous cyanobacteria that form tangled masses in warm alkaline lakes in Africa and Central and South America…
