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Geography, 28.01.2021 19:50 woodfordmaliky

2. Before life evolved adaptations for living on the land, a major change in one of Earth's systems took place. Which of the following was a change that made it possible for life as we know it to live on the land?
A addition of carbon to ocean water
B. addition of sodium to ocean water
C. addition of oxygen to the atmosphere
D. addition of ammonia to the atmosphere

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