How did Earth's atmosphere become oxygen-rich?A.Biological activityB.Volcanic outgassingC.Ozone depletionD.Tectonic movementSUBMITarrow_backPREVIOUS
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Solution 1
The Earth's atmosphere became oxygen-rich primarily due to biological activity, specifically photosynthesis. Here's a step-by-step explanation:
- Around 2.5 billion years ago, the first photosynthetic organisms, likely cyanobacteria, evolved. These organisms used sunlight to convert water and carb Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study prob
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