amberfacemyer amberfacemyer

05-12-2017
Physics

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What changes were necessary in earth’s atmosphere to allow complex organism to evolve

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calebbriggs calebbriggs

05-12-2017

A collision from above such as a meteor and an increase in volcano activity.

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zohazoee zohazoee

18-02-2020

Answer:

Earth’s original atmosphere was rich in methane, ammonia, water vapor, and the noble gas neon, but it lacked free oxygen.Oxygen had to become a major atmospheric gas and the ozone layer had to develop.

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