Ask Question
7 September, 21:12

Oxygen first entered earths atmosphere when one called organisms resembling modern cyanobacteria began to carry out the process of what

+3
Answers (1)
  1. 7 September, 21:23
    0
    Cyanobacteria were the first autotrophic organisms to evole in this universe. They are also known as blue green algae and contain photosynthetic pigments which carried out the process of photosynthesis and produce oxygen as a by products. In the begining the level of oxygen was not enough to form a part in the atmosphere. As cyanobacteria stared their life cycle the level of oxygen increased to 21%.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Oxygen first entered earths atmosphere when one called organisms resembling modern cyanobacteria began to carry out the process of what ...” in 📗 Biology if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers