Conclude by discussing the role of a microbial group that fundamentally influenced the evolution of life on earth. Specifically, discuss the role of this microbial group in: i) setting the chemical boundaries of life, ii) facilitating the development of complex eukaryotic metabolisms, and iii) promoting the habitability of terrestrial ecosystems.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Describe a possible progression of four microbial metabolic types on planet earth, beginning with what is believed to be a primitive metabolic type found at deep-sea hydrothermal vents. For each of the four metabolic types that you will name, detail the source and origin of energy, electrons, and carbon. Remember that redox reactions need both a donor and acceptor. For each transition between metabolic types, outline the selective measures or chemical environmental changes that led to the emergence of the considered metabolic types. One of these transitions should be linked to the rise of oxygen levels on the planet.

Conclude by discussing the role of a microbial group that fundamentally influenced the evolution of life on earth. Specifically, discuss the role of this microbial group in: i) setting the chemical boundaries of life, ii) facilitating the development of complex eukaryotic metabolisms, and iii) promoting the habitability of terrestrial ecosystems.

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