Early cyanobacteria are thought to be responsible for the liberation of molecular oxygen into the Earths primitive atmosphere. Which of these effects was achieved through the liberation of oxygen from cyanobacteria?

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    blocked ultraviolet radiation from reaching the surface of the Earth
    caused the mutations that resulted in the formation of aerobic cellular respiration
    caused the mutations that resulted in the formation of photosynthesis
    Both A and B are correct.
    All of the above are correct.
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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blocked ultraviolet radiation from reaching the surface of the Earth
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)



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