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Name the process through which oxygen was added to the atmosphere
  • a)
    Photosynthesis
  • b)
    Respiration
  • c)
    Excretion
  • d)
    Decomposition
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Name the process through which oxygen was added to the atmospherea)Pho...
Early organisms are known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. 
In fact, all the plants on Earth incorporate symbiotic cyanobacteria (known as chloroplasts) to do their photosynthesis of early days where no oxygen is present to this day.
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Name the process through which oxygen was added to the atmospherea)Photosynthesisb)Respirationc)Excretiond)DecompositionCorrect answer is option 'A'. Can you explain this answer?
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