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3 years ago

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

Physics

2 answers:

jok3333 [9.3K]3 years ago

6 0

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.

Zepler [3.9K]3 years ago

5 0

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

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3 years ago

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