brianaaaaa69 brianaaaaa69

03-12-2019
Biology

contestada

How did Earth's atmosphere become oxygen-rich?
O
A. Volcanic outgassing
O
B. Tectonic movement
O
O
c. Ozone depletion
D. Biological activity

Respuesta :

Ajae112 Ajae112

19-01-2021

Answer:

(D) Biological activity

Explanation:

just took the ap3x quiz :)

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HaruAzuna HaruAzuna

26-05-2022

Answer:

D.) Biological activity

Explanation:

I got it correct

Answer Link

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