Bacteria: Difference between revisions
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Bacteria are a singled-celled life form. Along with archea, bacteria are prokaryotic, meaning their cells do not have a distinct nucleus with a membrane. Bacteria reproduce uniparentally (from just one parent), when a cell divides into two, or when a small bud leaves the cell and eventually becomes the size of its parent.<ref>Lynn Margulis and Mark Chapman, ''Kingdoms & Domains: An Illustrated Guide to the Phyla of Life on Earth'' (Academic Press, 2009), 47.</ref> Due to global bacteria's extensive cooperation and gene-sharing, scientists and scholars have sometimes referred to bacteria as an example of decentralized mutual aid. | |||
Through a process known as ''horizontal gene transfer'', bacteria cells around the world so extensively swap genes with other that the biologists Sorin Sonea and Maurice Panisset referred to the world's bacteria as a giant superorganism.<ref>David Quammen, ''The Tangled Tree: A Radical New History of Life'' (New York: Simon & Schuster, 2018), part V.</ref> The swapping of genes has allowed bacteria to survive in a variety of extreme climates for billions of years. A team led by Bill Martin found that some 80 percent of genes in the bacteria genome had at some point arrived through horizontal gene transfer.<ref>Quammen, ''The Tangled Tree'', Part VI.</ref> | |||
Examining this gene swapping, Margulis and Sagan stress that bacteria function as "a sort of worldwide decentralized democracy." | |||
<blockquote> | <blockquote> | ||
As we move from a purely medical view of microbes to an | As we move from a purely medical view of microbes to an | ||
understanding of them as our ancestors, as planetary elders, | understanding of them as our ancestors, as planetary elders, oui | ||
emotions also change, from fear and loathing to | emotions also change, from fear and loathing to lespect and awe. | ||
Bacteria invented fermentation, the wheel in the form of the | Bacteria invented fermentation, the wheel in the form of the | ||
proton rotary motor, sulfur breathing, photosynthesis, and | proton rotary motor, sulfur breathing, photosynthesis, and | ||
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with very different others may be taking a step toward the ancient | with very different others may be taking a step toward the ancient | ||
wisdom of the microcosm. | wisdom of the microcosm. | ||
</blockquote> | </blockquote> | ||
They go onto support a global federation of communities based on the example of bacterial symbiosis. Graham Purchase comments, "This vision has much in common with that of many prominent 19th century anarchist thinkers, notably Elisee Reclus and Peter Kropotkin."<ref>Graham Purchase, ''Anarchism & Environmental Survival'' (Tucson: See Sharp Press, 1994), 20.</ref> | |||
Bacteria have played a number of beneficial roles for other life-forms. They invented photosynthesis. They are crucial for humans' digestive systems, and for soil maintenance in forests and on farms. Many antibiotics come from bacteria. Reportedly, "Life on Earth would die out faster if organisms in the Superkingdom Prokarya [Bacteria] became extinct than if any of the other life-forms disappeared."<ref>Margulis and Chapman, ''Kingdoms & Domains'', 41, 46.</ref> According to widely accepted scientific theory, bacterial cells have entered, through horizontal gene transfer over the course of roughly two billion years, into the genomes of all animal cells including human cells."<ref>Quammen, ''The Tangled Tree'', Part III.</ref> | |||
Bacteria have played a number of beneficial roles for other life-forms. They invented photosynthesis. They are crucial for humans' digestive systems, and for soil maintenance in forests and on farms. Many antibiotics come from bacteria. | |||
<references/> | <references/> | ||
Latest revision as of 05:02, 19 November 2024
Bacteria are a singled-celled life form. Along with archea, bacteria are prokaryotic, meaning their cells do not have a distinct nucleus with a membrane. Bacteria reproduce uniparentally (from just one parent), when a cell divides into two, or when a small bud leaves the cell and eventually becomes the size of its parent.[1] Due to global bacteria's extensive cooperation and gene-sharing, scientists and scholars have sometimes referred to bacteria as an example of decentralized mutual aid.
Through a process known as horizontal gene transfer, bacteria cells around the world so extensively swap genes with other that the biologists Sorin Sonea and Maurice Panisset referred to the world's bacteria as a giant superorganism.[2] The swapping of genes has allowed bacteria to survive in a variety of extreme climates for billions of years. A team led by Bill Martin found that some 80 percent of genes in the bacteria genome had at some point arrived through horizontal gene transfer.[3]
Examining this gene swapping, Margulis and Sagan stress that bacteria function as "a sort of worldwide decentralized democracy."
As we move from a purely medical view of microbes to an understanding of them as our ancestors, as planetary elders, oui emotions also change, from fear and loathing to lespect and awe. Bacteria invented fermentation, the wheel in the form of the proton rotary motor, sulfur breathing, photosynthesis, and nitrogen fixation, long before our evolution. They are not only highly social beings, but behave as a sort of worldwide decentralized democracy. Cells basically remain separate, but can connect and trade genes with organisms of even exceedingly different backgrounds. Realizing that human individuals also remain basically separate but can connect and trade knowledge with very different others may be taking a step toward the ancient wisdom of the microcosm.
They go onto support a global federation of communities based on the example of bacterial symbiosis. Graham Purchase comments, "This vision has much in common with that of many prominent 19th century anarchist thinkers, notably Elisee Reclus and Peter Kropotkin."[4]
Bacteria have played a number of beneficial roles for other life-forms. They invented photosynthesis. They are crucial for humans' digestive systems, and for soil maintenance in forests and on farms. Many antibiotics come from bacteria. Reportedly, "Life on Earth would die out faster if organisms in the Superkingdom Prokarya [Bacteria] became extinct than if any of the other life-forms disappeared."[5] According to widely accepted scientific theory, bacterial cells have entered, through horizontal gene transfer over the course of roughly two billion years, into the genomes of all animal cells including human cells."[6]
- ↑ Lynn Margulis and Mark Chapman, Kingdoms & Domains: An Illustrated Guide to the Phyla of Life on Earth (Academic Press, 2009), 47.
- ↑ David Quammen, The Tangled Tree: A Radical New History of Life (New York: Simon & Schuster, 2018), part V.
- ↑ Quammen, The Tangled Tree, Part VI.
- ↑ Graham Purchase, Anarchism & Environmental Survival (Tucson: See Sharp Press, 1994), 20.
- ↑ Margulis and Chapman, Kingdoms & Domains, 41, 46.
- ↑ Quammen, The Tangled Tree, Part III.
