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What gases are represented by label b and how do these gas levels relate to the evolution of photosynthetic organisms
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What gases are represented by label b and how do these gas levels relate to the evolution of photosynthetic organisms

User Eyberg
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Answer:Our planet's atmosphere has changed quite a bit over time.

Step-by-step explanation:

The planet is generally thought of as having three distinct atmospheres over the course of its lifetime.

User Hatted
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