A comet. It’s a smaller celestial body that’s composed of mainly ice and dust.
Answer:
B. False
Explanation:
Additional information is not typically required to enter the fields of law.
Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.
The Great Oxidation lasted 2.4 to 2.0 billion years ago.
Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.
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Explanation:
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