If you were to sequence the genomes of representative genera from each layer and construct a phylogenetic tree, which outcome would you expect to find? No monophyletic groups would be seen in the phylogeny. There would be a single monophyletic group formed by the cyanobacteria. Genera from the other layers would form paraphyletic groupings. There would be four monophyletic groups, one for each layer represented in the column. There would be a single monophyletic group formed by all photosynthetic bacteria. Genera from the other layers would form paraphyletic groupings.

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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If you were to sequence the genomes of representative genera from each layer and construct a phylogenetic tree, which
outcome would you expect to find?
No monophyletic groups would be seen in the phylogeny.
There would be a single monophyletic group formed by the cyanobacteria. Genera from the other layers would form
paraphyletic groupings.
There would be four monophyletic groups, one for each layer represented in the column.
There would be a single monophyletic group formed by all photosynthetic bacteria. Genera from the other layers would
form paraphyletic groupings.
Transcribed Image Text:If you were to sequence the genomes of representative genera from each layer and construct a phylogenetic tree, which outcome would you expect to find? No monophyletic groups would be seen in the phylogeny. There would be a single monophyletic group formed by the cyanobacteria. Genera from the other layers would form paraphyletic groupings. There would be four monophyletic groups, one for each layer represented in the column. There would be a single monophyletic group formed by all photosynthetic bacteria. Genera from the other layers would form paraphyletic groupings.
The figure shows stratification of microbial layers in a Winogradsky column (a method used to simulate environments
similar to microbial mats observed in nature).
Cyanobacteria
and algae
Nonsulfur
photosynthetic
bacteria
(e.g., Rhodomicrobium)
Purple
photosynthetic
bacteria
(e.g., Chromatium)
Green
photosynthetic
bacteria
(e.g., Chlorobium)
Air
Liquid
Aerobic zone
Microaerophilic zone
(Less anaerobic)
Anaerobic zone
(More anaerobic)
Mud mixed with
sulfate and carbonate
salts and cellulose or
other organics
Transcribed Image Text:The figure shows stratification of microbial layers in a Winogradsky column (a method used to simulate environments similar to microbial mats observed in nature). Cyanobacteria and algae Nonsulfur photosynthetic bacteria (e.g., Rhodomicrobium) Purple photosynthetic bacteria (e.g., Chromatium) Green photosynthetic bacteria (e.g., Chlorobium) Air Liquid Aerobic zone Microaerophilic zone (Less anaerobic) Anaerobic zone (More anaerobic) Mud mixed with sulfate and carbonate salts and cellulose or other organics
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