
Concept explainers
The sequence of following events: living cell, oxidizing atmosphere, eukaryotes developed, reducing atmosphere, first organic molecule.

Answer to Problem 1CQ
The correct sequence of the events that occurred on the Earth is reducing atmosphere, the formation of a first organic molecule, development of living cell, the oxidizing atmosphere on the Earth, and the development of eukaryotes.
Explanation of Solution
The early stages of the Earth showed the presence of reducing atmosphere and reducing gases on the Earth due to the high level of volcanic eruptions, lightning and ultraviolet
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Chapter 21 Solutions
Integrated Science
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