lelelele4679 lelelele4679

01-11-2019
Biology

contestada

During an early phase of the planet's existence, Earth's atmosphere was similar in composition to the atmospheres of Mars and Venus. At that time Earth's principal atmospheric gas was:a. nitrogenb. carbon dioxidec. oxygend. water vapore. argon

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Gigi007 Gigi007

02-11-2019

The answer is b. Carbon Dioxide

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