منابع مشابه
GE Prize-winning essay. The emergence of cells during the origin of life.
1558 M odern living organisms are organized into cells. Fundamentally, a cell consists of a genome, which carries information, and a membrane, which separates the genome from the external environment. By segregating individual genomes from one another, cellular organization is thought to be critical to the evolution of replicating systems (1, 2). Some of the oldest known rocks on Earth (~3.5 bi...
متن کامل1999 KUIPER PRIZE LECTURECometary Origin of the Biosphere
Most of the biosphere was brought on the primitive Earth by an intense bombardment of comets. This included the atmosphere, the seawater and those volatile carbon compounds needed for the emergence of life. Comets were thrown into the inner Solar System by the strong perturbation induced by the growth of the giant planets’ cores. The bulk of the Earth’s bombardment came from those comets that a...
متن کاملThe origin of life
Ž 9 . Microfossil finds have been firmly established at about 3.5 Ga giga annees10 years , but no rocks older than about 4.0 Ga have been demonstrated, leaving the history of the first 0.6 Ga missing. This gap has been filled by models of the solar system. The origin of the ocean, atmosphere, and much crustal material apparently lies in a heavy rain of comets, subsequent to the catastrophic Moo...
متن کاملThe Origin of Life
The origin of life is in a sense a genetic problem, for, as H. J. Muller pointed out many ears ago, the essential attribute that identifies living matter is its capacity to replicate itself and its variants (1). Because this uniquely biological property has its physical basis in proteins and nucleic acids, the goal of modem work on the origin of life is to discover the manner of origin of these...
متن کاملThe Origin of Life
living beings were constantly arising out of dead matter. Maggots were suposed to be generated spontaneously in decaying meat. In 1668 Redi showed that this did not happen provided insects were carefully excluded. And in 1860 Pasteur extended the proof to the bacteria which he had shown were the cause of putrefaction. It seemed fairly clear that all the living beings known to us originate from ...
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ژورنال
عنوان ژورنال: Origins of Life and Evolution of Biospheres
سال: 2011
ISSN: 0169-6149,1573-0875
DOI: 10.1007/s11084-011-9242-5