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Sagot :
Final answer:
The Precambrian Earth underwent major changes in various spheres like the biosphere, atmosphere, and hydrosphere.
Explanation:
The Precambrian Earth experienced significant changes relating to different spheres:
- Biosphere: Cyanobacteria emerged as a life-form and started the oxygenation process of the atmosphere.
- Atmosphere: Oxygen spilled into this sphere from ocean waters.
- Hydrosphere: The oceans contained far less salt than they do today, and oxidation in rocks and minerals was not possible.
Learn more about Precambrian Earth and Spheres here:
https://brainly.com/question/43743045
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