Oxygen in atmosphere has been formed by _____(a) Evaporation of water(b) Metabolism of microorganisms(c) Decaying organisms(d) Photosynthesis of blue green algaeThe question was posed to me in homework.My question is from Evolution in chapter Evolution of Biology – Class 12

Oxygen in atmosphere has been formed by _____(a) Evaporation of water(

1.	Oxygen in atmosphere has been formed by _____(a) Evaporation of water(b) Metabolism of microorganisms(c) Decaying organisms(d) Photosynthesis of blue green algaeThe question was posed to me in homework.My question is from Evolution in chapter Evolution of Biology – Class 12
Answer» RIGHT option is (d) PHOTOSYNTHESIS of blue green algae For explanation: MILLIONS of years back, it was DUE to photosynthesis of blue green algae that resulted in the formation of OXYGEN in atmosphere. It gave the foundation for evolution.

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Oxygen in atmosphere has been formed by _____(a) Evaporation of water(b) Metabolism of microorganisms(c) Decaying organisms(d) Photosynthesis of blue green algaeThe question was posed to me in homework.My question is from Evolution in chapter Evolution of Biology – Class 12

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