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Microbial contributions to the Precambrian EarthLife has existed on Earth for approximately 3.5 billion years. For most of this time, prokaryotic communities provided the major biological forces changing the Earth. Many changes in atmospheric gas composition occurred during the Archean and Proterozoic eons as a result of microbial activity. Extant microbial communities were used to help understand the dynamics which contributed to these atmospheric changes. The microbial mat communities were characterized according to the organismic constituents. Symbiosis in microbial communities is recognized as a major force in cell evolution. Among the evolutinary enigmas investigated is the problem of the origin of the undulipodia. Undulipodial microtubules are still deployed for major cellular processes such as mitosis and meiosis. Several prokaryotes were tested for the presence of the S1-type protein, so far only spirochetes were found to possess it. The S1-type protein is being sought in cyanobacteria reported to contain microtubules.
Document ID
19860017427
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Margulis, L.
(Boston Univ. Boston, MA, United States)
Bermudes, D.
(Boston Univ. Boston, MA, United States)
Obar, R.
(Boston Univ. Boston, MA, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1986
Publication Information
Publication: NASA, Washington Second Symposium on Chemical Evolution and the Origin and Evolution of Life
Subject Category
Space Biology
Accession Number
86N26899
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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