The proliferation of cyanobacteria was a major contributing factor to the appearance of advanced organisms. Identify the gas released by the cyanobacteria that supports this statement

a.) ferrous Oxide
b.) oxygen
c.) hydrogen

Question

The proliferation of cyanobacteria was a major contributing factor to the appearance of advanced organisms. Identify the gas released by the cyanobacteria that supports this statement

a.) ferrous Oxide 
b.) oxygen 
c.) hydrogen

thomaster · Answer

cyanobacteria use photosynthesis. The released gas in photosynthesis is O2 (oxygen)
$$6CO_2+6H_2O+light \Rightarrow C_6H_{12}O_6+6O_2$$                                                                ^^^

thomaster · Answer

Oh, and welcome here on openstudy of course! :D

anonymous · Answer

@thomaster is right. cyanobacteria are photosynthetic organisms; as a result, they produce oxygen as a by-product of photosynthesis (just as plants).

anonymous · Answer

B. oxygen