A Quote by Elliott Sober

Evolutionary biologists often appeal to parsimony when they seek to explain why organisms "match" with respect to a given trait. For example, why do almost all the organisms that are alive today on our planet use the same genetic code? If they share a common ancestor, the code could have evolved just once and then been inherited from the most recent common ancestor that present organisms share. On the other hand, if organisms in different species share no common ancestors, the code must have evolved repeatedly.

Elliott Sober

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Alive Almost Almost All Ancestor Ancestors Appeal Been Code Common Could Different Evolutionary Evolved Example Explain For Example Genetic Given Hand Inherited Just Match Most Must Often Once Organisms Other Our Our Planet Parsimony Planet Present Recent Repeatedly Respect Same Seek Share Species Then Today Trait Use Why

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Elliott Sober
Philosopher
Born: June 6, 1948

I find the idea of common descent (that all organisms share a common ancestor) fairly convincing, and have no particular reason to doubt it.

Michael Behe

The existence of common features in different forms of life indicates some relationship between the different organisms, and according to the concept of evolution, these relations stem from the circumstance that the higher organisms, in the course of millions of years, have gradually evolved from simpler ones.

Hans Adolf Krebs

If the organisms in a species now have trait T, and this trait now helps those organisms to survive and reproduce because the trait has effect E, a natural hypothesis to consider is that T evolved in the lineage leading to those current organisms because T had effect E. This hypothesis is "natural," but it often isn't true!

Elliott Sober

Blockchains are digital organisms. As organisms evolve through changes in their DNA, blockchain protocols evolve through changes in their code. And like biological organisms, the most adaptive blockchains will be the ones that survive and thrive.

Fred Ehrsam

As commonly understood, creationism involves belief in an earth formed only about ten thousand years ago, an interpretation of the Bible that is still very popular. For the record, I have no reason to doubt that the universe is the billions of years old that physicists say it is. Further, I find the idea of common descent (that all organisms share a common ancestor) fairly convincing, and have no particular reason to doubt it.

Michael Behe

Trait X is fitter than trait Y in a population of organisms if those organisms have other biological traits T and live in an environment that has properties E. The theory of natural selection is filled with statements of this form.

Elliott Sober

In the beginning, there were bacteria.... [A] nearly universal assumption is that all subsequent life descended from the original life form through a continuous chain of ancestor-descendant pairs. This assumption looks good because all living organisms share biochemical traits. It is conceivable, of course, that life originated more than once on the early earth but that all except one life form died out early, leaving a single lineage as the ancestor of life as we know it. If this did happen, it was the first important species extinction.

David M. Raup

Four elements, Hydrogen, carbon, oxygen and nitrogen, also provide an example of the astonishing togetherness of our universe. They make up the "organic" molecules that constitute living organisms on a planet, and the nuclei of these same elements interact to generate the light of its star. Then the organisms on the planet come to depend wholly on that starlight, as they must if life is to persist. So it is that all life on the Earth runs on sunlight. [Referring to photosynthesis]

George Wald

The chemical differences among various species and genera of animals and plants are certainly as significant for the history of their origins as the differences in form. If we could define clearly the differences in molecular constitution and functions of different kinds of organisms, there would be possible a more illuminating and deeper understanding of question of the evolutionary reactions of organisms than could ever be expected from morphological considerations.

Ray Lankester

Bacteria are single-celled organisms. Bacteria are the model organisms for everything that we know in higher organisms. There are 10 times more bacterial cells in you or on you than human cells.

Bonnie Bassler

The theory of natural selection is the centerpiece of The Origin of Species and of evolutionary theory. It is this theory that accounts for the adaptations of organisms, those innumerable features that so wonderfully equip them for survival and reproduction; it is this theory that accounts for the divergence of species from common ancestors and thus for the endless diversity of life. Natural selection is a simple concept, but it is perhaps the most important idea in biology.

Douglas J. Futuyma

We are here because over billions of years, countless variables fell into place, any of which could have taken another path. We are essentially a beautiful fluke, as are the millions of other species with which we share this planet. Our cells are composed of atoms and dust particles from distant galaxies, and from the billions of living organisms that inhabited this planet before us.

Wendy Mass

You put three facts together - that all organisms produce more offspring that can survive, that there's variation among organisms, and that at least some of that variation is inherited - and the syllogistic inference is natural selection.

Stephen Jay Gould

We observe closely related species in sympatry and infer how they evolved from a common ancestor.

Peter R. Grant

As biologists, we contemplate with admiration and awe the wondrous array of sophisticated cell interactions and recognitions evolved in the T cell immune system, which must be a model for other similarly complex biological systems of highly differentiated organisms.

Baruj Benacerraf

Its important to remember that we evolved. Now, I know thats a dirty word for some people, but we evolved from common ancestors with the gorillas, the chimpanzee and also the bonobos. We have a common past, and we have a common future.

Louise Leakey

A Quote by Elliott Sober

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