A key event in the biosphere was the appearance of complex life in the oceans. The initial appearance of complex cellular life in the oceans immediately followed the global change in the chemical make-up of the atmosphere about 2 billion years ago. What became a permanent part of the Earth’s atmosphere at that time?
A key event in the biosphere was the appearance of complex life in the oceans. The initial appearance of complex cellular life in the oceans immediately followed the global change in the chemical make-up of the atmosphere about 2 billion years ago. What became a permanent part of the Earth’s atmosphere at that time?
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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A key event in the biosphere was the appearance of complex life in the oceans. The initial appearance of complex cellular life in the oceans immediately followed the global change in the chemical make-up of the atmosphere about 2 billion years ago. What became a permanent part of the Earth’s atmosphere at that time?
- A. Argon
- B. Oxygen
- C. Nitrogen
- D. Methane
- E. Carbon dioxide
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A key event in the biosphere was the appearance of complex life in the oceans. The initial appearance of complex cellular life in the oceans immediately followed the global change in the chemical make-up of the atmosphere about 2 billion years ago. What became a permanent part of the Earth’s atmosphere at that time?
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