Lynn Margulis: Evolution

Lynn Margulis was American evolutionary biologist. Explore interesting quotes on evolution.
Lynn Margulis: 48   quotes 20   likes

“Evolution is no linear family tree, but change in the single multidimensional being that has grown to cover the entire surface of Earth.”

Lynn Margulis

Source: What Is Life?

Family , Tree , Change

“Although random mutations influenced the course of evolution, their influence was mainly by loss, alteration, and refinement… Never, however, did that one mutation make a wing, a fruit, a woody stem, or a claw appear. Mutations, in summary, tend to induce sickness, death, or deficiencies. No evidence in the vast literature of heredity changes shows unambiguous evidence that random mutation itself, even with geographical isolation of populations, leads to speciation.”

Lynn Margulis

Source: Acquiring Genomes: A Theory Of The Origin Of Species

Death , Literature , Appearance , Change

“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

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

Disease , Parting

“I work in evolutionary biology, but with cells and microorganisms. Richard Dawkins, John Maynard Smith, George Williams, Richard Lewontin, Niles Eldredge, and Stephen Jay Gould all come out of the zoological tradition, which suggests to me that, in the words of our colleague Simon Robson, they deal with a data set some three billion years out of date. Eldredge and Gould and their many colleagues tend to codify an incredible ignorance of where the real action is in evolution, as they limit the domain of interest to animals… very tardy on the evolutionary scene, and they give us little real insight into the major sources of evolution's creativity. By "codifying ignorance" I refer in part to the fact that they miss four of the five kingdoms of life… bacteria, protoctista, fungi, and plants.”

Lynn Margulis

"Gaia is a Tough Bitch," The Third Culture: Beyond the Scientific Revolution ed., John Brockman (1995).

Life , Animals , Parting

“The oxygen crisis that began only two billion years ago prompted the evolution of respiring bacteria. These microbes that used oxygen to derive biochemical energy more efficiently than ever before eventually took over most of the world. Some of the oxygen-breathing bacteria became symbiotic, merging with different (oxygen-eschewing) bacteria to form nucleated cells, which, after becoming sexual, evolved into fungi, plants, and animals.”

Lynn Margulis

with Dorion Sagan, Dazzle Gradually: Reflections on the Nature of Nature (2007).

World , Animals

“The view of evolution as a chronic bloody competition among individuals and species, a popular distortion of Darwin's notion of "survival of the fittest," dissolves before a new view of continual cooperation, strong interaction, and mutual dependence among life forms. Life did not take over the globe by combat, but by networkiing. Life forms multiplied and complexified by co-opting others, not just by killing them.”

Lynn Margulis

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

Life , Strong , Dependency