Given that the early atmosphere did not contain oxygen gas, using only the information covered in Lab 5 please explain how photosynthesis was able to occur in this type of early atmosphere
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Given that the early atmosphere did not contain oxygen gas, using only the information covered in Lab 5 please explain how photosynthesis was able to occur in this type of early atmosphere
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- Scientist have determined that the early Earth had no free oxygen anywhere. Briefly explain what evidence in the rock layers that scientists found to prove when the early conditions on earth had free oxygen in the atmosphere.What was the most significant contribution of early photosynthetic organisms to Earth’s environment?Briefly explain how the production of oxygen by early photosynthetic organisms lead to colonization of land. 
- What is the origin of oxygen on earth? What would happen to earth’s supply of oxygen if photosynthesis suddenly were to cease?In ancient times, earth atmosphere contain no oxygen. Whatvform of respiration do think was used by earliest form of life? Explain your answer.What form of photosynthesis was most likely the first to appearon Earth?
- Explain why Cyanobacteria is considered the first photosynthetic organisms in the earth’s revolution?An abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth. a. hydrogen b. methane c. oxygen d. nitrogenExplain how the evolution of photosynthetic autotrophs affected both the atmosphere and other organisms.
- In what order would the following processes may have evolved? Please provide an explanation for the order chosen. The processes: Krebs cycle, Electron transport, Glycolysis, and PhotosynthesisBefore the emergence of life of what gases was the earth's primitive atmosphere constituted?Photosynthesis led to the first-ever ice age in Earth's history by absorbing carbon from the atmosphere and expelling ____.