Compare and contrast the physical and chemical conditions on Earth at the time life first arose with

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Compare and contrast the physical and chemical conditions on Earth at the time life first arose with conditions today. From a physiological standpoint, discuss at least two reasons why animals could not have existed on early Earth. In what ways has microbial metabolism altered Earth’s biosphere? How might life on Earth be different if oxygenic photosynthesis had not evolved?
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Brock Biology of Microorganisms

ISBN: 978-0321897398

14th edition

Authors: Michael Madigan, John Martinko, Kelly Bender, Daniel Buckley

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