Friday, March 29, 2024 Text is available under the CC BY-SA 3.0 licence.

Robert Jastrow

« All quotes from this author
 

We can assume that in a relatively short time — perhaps within 100 million years — the one celled organism evolved into a colony of cells. With the further passage of time, groups of cells within those colonies assumed specialized functions of food-gathering, digestion, the structural features of an outer skin, and so on; thus began the stage of evolution leading to the complex, many-celled creatures which dominate life today.
The fossil record contains no trace of these preliminary stages in the development of many-celled organisms. The first clues to the existence of relatively advanced forms of life consist of a few barely discernible tracks, presumably made in the primeval slime by soft, wriggling wormlike animals. These are found in rocks about one billion years old. These meager remains are the earliest traces of many-celled animal life on the planet.
--
Red Giants and White Dwarfs : Man's Descent from the Stars (1971), p. 249

 
Robert Jastrow

» Robert Jastrow - all quotes »



Tags: Robert Jastrow Quotes, Authors starting by J


Similar quotes

 

I would give Wells' book a grade of an "F", because he distorts and mis-quotes scientists and does not write to encourage people to build upon a logical foundation, but rather to blindly accept his "proofs" that evolution is wrong. Wells offers no alternative scientific theory to explain the fossil record. If not by Darwinian evolution, then HOW did life gradually change from single-celled simple bacteria 3.5 billion years ago (which Wells says he accepts), to the present explosion of life in all of its complexity all around us? In short he fails to convincingly demonstrate to me, as a fellow molecular biologist, that most of the "Icons" are really the essential foundations of evolution he claims, and he offers no compelling evidence to me that these are indeed 'frauds'. However, I am seriously concerned that Wells claims himself to be a "molecular biologist", and yet questions the very foundations of molecular biology (DNA makes RNA makes protein) as some sort of Darwinist conspiracy.

 
Jonathan Wells
 

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
 

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
 

But I didn't believe in the theory that human beings – thinking, loving beings – originated from fish that sprouted legs and crawled out of the sea. Or that human beings began as single-celled organisms that developed into monkeys who eventually swung down from trees; I believed we came about through a random process, but were created by God.

 
Sarah Palin
 

The fallacy of genetic determinism is to suppose that the genes "make' the organism. It is a basic principle of developmental biology that organisms undergo a continuous development from conception to death, a development that is the unique consequence of the interaction of the genes in their cells, the temporal sequence of environments through which the organisms pass, and random cellular processes that determine the life, death, and transformation of cells. As a result, even the fingerprints of identical twins are not identical. Their temperaments, mental processes, abilities, life choices, disease histories, and death certainly differ despite the determined efforts of many parents to enforce as great a similarity as possible.

 
Richard Lewontin
© 2009–2013Quotes Privacy Policy | Contact