Oxygen gas (O₂) in Earth's early atmosphere A) allowed the evolution of anoxic metabolism. B) depleted ozone in the atmosphere. C) increased damage to organisms by allowing more ultraviolet light in. D) allowed organisms to move from the sea to land. E) was not toxic to most prokaryotes.

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Oxygen gas in Earth's early atmosphere allowed organisms to move from the sea to land because it allowed for the development of ozone which helped to protect against harmful UV radiation from the sun. This in turn allowed for the evolution of plants on land, which provided food and habitat for other organisms.

Oxygen Gas (O2) in Earth's Early Atmosphere

Oxygen Gas (O₂) in Earth's Early Atmosphere