What does the presence of cyanobacteria in the earliest known stromatolites indicate about evolution of life on earth up to that

Question

What does the presence of cyanobacteria in the earliest known stromatolites indicate about evolution of life on earth up to that point in time Study the tree before composing your answer and make sure to reference aspects of the tree in your discussion such as the sequence of branch points to support your answer Bacteria Flavobacteria Cyanobacteria Thermotogales Green 000 sulfur bacteria Archaea Euryarchaeota Methanosarcina Methano bacterium Gram Purple positives Crenarchaeota Methanococcus bacteria Thermoproteut Pyrodiction Thermococcia celer Eukarya Entamoebae Slime molds Halophiles Animals Fungi Plants Ciliates Flagellates Trichomonads Microsporidia Diplomonads

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