Quotes about bacterium (10 quotes) | Quotes of famous people

“In the long run, the most vicious predators, like most dread disease-causing microbes, bring about their own ruin by killing their victims. Restrained predation—the attack that doesn't kill or does kill only slowly—is a recurring theme in evolution. The predatory precursors of mitochondria invaded and exploited their hosts, but the prey resisted. Forced to be content with an expendable part of the prey (its waste)… some mitochondria precursors grew but never killed their providers. …The original prey was probably a larger bacterium like Thermoplasma.”

Lynn Margulis (1938–2011) American evolutionary biologist

Microcosmos: Four Billion Years of Evolution from Our Microbial Ancestors (1986)

Disease , Parting

“I wish, I wish I were a poisonous bacterium.”

Dorothy Parker (1893–1967) American poet, short story writer, critic and satirist

“Hold somebody's hand and feel its warmth. Gram per gram, it converts 10 000 times more energy per second that the sun. You find this hard to believe? Here are the numbers: an average human weighs 70 kilograms and consumes about 12 600 kilojoules / day; that makes about 2 millijoules / gram. second, or 2 milliwatts / gram. For the sun it's a miserable 0.2 microjoules / gram. second. Some bacteria, such as the soil bacterium "Azotobacter" convert as much as 10 joules / gram. second, outperforming the sun by a factor 50 million. I am warm because inside each of my body cells there are dozens, hundreds or even thousands of mitochondria that burn the food I eat.”

Gottfried Schatz (1936–2015) biochemist

Jeff's view on science and scientists (Amsterdam, Elsevier Butterworth-Heinemann, 2006, ISBN 0-444-52133-X, pbk.), Ch. 5: "The tragic matter" (p. 43).

Food , Feeling , Time , Sun

“What I am trying to do is to present a unified scientific view of life; that is, a view integrating life's biological, cognitive, and social dimensions. I have had many discussions with social scientists, cognitive scientists, physicists and biologist who question that task, who said that this would not be possible. They ask, why do I believe that I can do that? My belief is based largely on our knowledge of evolution. When you study evolution, you see that there was, first of all, evolution before the appearance of life, there was a molecular type of evolution where structures of greater and greater complexity evolved out of simple molecules. Biochemist who study that have made tremendous progress in understanding that process of molecular evolution. Then we had the appearance of the first cell which was a bacterium. Bacteria evolved for about 2 billion years and in doing so invented, if you want to use the term, or created most of the life processes that we know today. Biochemical processes like fermentation, oxygen breathing, photosynthesis, also rapid motion, were developed by bacteria in evolution. And what happened then was that bacteria combined with one another to produce larger cells — the so-called eukaryotic cells, which have a nucleus, chromosomes, organelles, and so on. This symbiosis that led to new forms is called symbiogenesis.”

Fritjof Capra (1939) American physicist

Capra (2007) in: Francis Pisani " An Interview with Fritjof Capra http://ijoc.org/ojs/index.php/ijoc/article/view/69/25" in: International Journal of Communication Vol 1 (2007).

Life , Understanding , Question , Knowledge

“As I thought about this, I noted that the bacterium is just a physical system; it's just a bunch of molecules that hang together and do things to one another. So, I wondered, what characteristics are necessary for a physical system to be an autonomous agent? After thinking about this for a number of months I came up with a tentative definition.
My definition is that an autonomous agent is something that can both reproduce itself and do at least one thermodynamic work cycle. It turns out that this is true of all free-living cells, excepting weird special cases. They all do work cycles, just like the bacterium spinning its flagellum as it swims up the glucose gradient. The cells in your body are busy doing work cycles all the time.”

Stuart Kauffman (1939) American biophysicist

The Adjacent Possible: A Talk with Stuart Kauffman, 2003

Business , Thinking , Time

“In his famous book, What is Life?, Erwin Schrödinger asks, "What is the source of the order in biology?" He arrives at the idea that it depends upon quantum mechanics and a microcode carried in some sort of aperiodic crystal—which turned out to be DNA and RNA—so he is brilliantly right. But if you ask if he got to the essence of what makes something alive, it's clear that he didn't. Although today we know bits and pieces about the machinery of cells, we don't know what makes them living things. However, it is possible that I've stumbled upon a definition of what it means for something to be alive.
For the better part of a year and a half, I've been keeping a notebook about what I call autonomous agents. An autonomous agent is something that can act on its own behalf in an environment. Indeed, all free-living organisms are autonomous agents. Normally, when we think about a bacterium swimming upstream in a glucose gradient we say that the bacterium is going to get food. That is to say, we talk about the bacterium teleologically, as if it were acting on its own behalf in an environment. It is stunning that the universe has brought about things that can act in this way. How in the world has that happened?”

Stuart Kauffman (1939) American biophysicist

The Adjacent Possible: A Talk with Stuart Kauffman, 2003

Life , Books , World , Food

“[The smallest bacterium] is so much more like people than Stanley Miller’s mixtures of chemicals, because it already has these system properties. So to go from a bacterium to people is less of a step than to go from a mixture of amino acids to that bacterium.”

Lynn Margulis (1938–2011) American evolutionary biologist

Cited in the book: Is There a Creator Who Cares About You?

People

“Simonson, in rubber jacket and similar galoshes, bound with whip-cord over woolen socks (he was a vegetarian and did not use the skin of animals), was also awaiting the departure of the party. He stood near the entrance of the house, writing down in a note-book a thought that occurred to him. “If,” he wrote, “a bacterium were to observe and analyze the nail of a man, it would declare him an inorganic being. Similarly, from an observation of the earth’s surface, we declare it to be inorganic. That is wrong.””

Leo Tolstoy book Resurrection

Source: Resurrection (1899), Ch. 83

Books , Departure , Animals , Housing

“Let’s instead define life very broadly, simply as a process that can retain its complexity and replicate. What’s replicated isn’t matter (made of atoms) but information (made of bits) specifying how the atoms are arranged. When a bacterium makes a copy of its DNA, no new atoms are created, but a new set of atoms are arranged in the same pattern as the original, thereby copying the information. In other words, we can think of life as a self-replicating information-processing system whose information (software) determines both its behavior and the blueprints for its hardware.”

Max Tegmark (1967) Swedish-American cosmologist

Life 3.0: Being Human in the Age of Artificial Intelligence (2017)

Life , Behavior , Thinking

“In the actual duration of his life, the individual ranges from the bacterium's hour to the the big tree's five thousand years.”

Julian Huxley (1887–1975) English biologist, philosopher, author

"The Individual in the Animal Kingdom" (1912); quoted in From Gaia to Selfish Genes: Selected Writings in the Life Sciences (1992) by Connie Barlow, Ch. 6 "Blurred Bounds of Individuality" 
Context: In the actual duration of his life, the individual ranges from the bacterium's hour to the the big tree's five thousand years. Man in this again stands at the pinnacle of individuality — not in mere length of days, but in having found a means to perpetuate a part of himself in spite of death.
By speech first, but far more by writing, man has been able to put something of himself beyond death. In tradition and in books an integral part of the individual persists, for it can influence the minds and actions of other people in different places and at different times: a row of black marks on a page can move a man to tears, though the bones of him that wrote it are long ago crumbled to dust. In truth, the whole progress of civilization is based upon this power. Once more the upward progress of terrestrial life towards individuality has found apparently insurmountable obstacles, gross material difficulties before it, but once more through consciousness it finds wings, and, laughing at matter, flies over lightly where it could not climb.
To such an individuality, one that can thus transcend the limits of its substance, the name Personality is commonly given. Man alone possesses true personality, though there is as it were an aspiration towards it visible among the higher vertebrates, stirring their placid automatism with airs of consciousness.

Life , Tree