The Origins of Life on the Earth |
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Page 5
... Solar System Any treatment of the conditions which existed on the primitive earth when life began must start by considering the way in which the solar system itself was formed . This procedure , incidentally , provides a natural basis ...
... Solar System Any treatment of the conditions which existed on the primitive earth when life began must start by considering the way in which the solar system itself was formed . This procedure , incidentally , provides a natural basis ...
Page 8
... solar system from cosmic dust cloud . ( a ) The spherical cloud has collapsed to a disk . ( b ) The material in the dust cloud is aggregating to form larger objects . ( c ) Aggregation is continuing and the objects are condensing to ...
... solar system from cosmic dust cloud . ( a ) The spherical cloud has collapsed to a disk . ( b ) The material in the dust cloud is aggregating to form larger objects . ( c ) Aggregation is continuing and the objects are condensing to ...
Page 15
... solar system and the earth . A few of these are : H. C. Urey , The Planets : Their Origin and Development ( Yale University Press , New Haven , 1952 ) . H. C. Urey , " Chemical evidence relative to the origin of the solar system ...
... solar system and the earth . A few of these are : H. C. Urey , The Planets : Their Origin and Development ( Yale University Press , New Haven , 1952 ) . H. C. Urey , " Chemical evidence relative to the origin of the solar system ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
21 other sections not shown
Common terms and phrases
abundant active adenine alanine aldehydes amino acids ammonia ammonium amounts anticodon aqueous solution aspartic acid biochemical biological CaCO3 carbon CH₂ chain chemical chert CO₂ concentration condensation contain COOH cyanoacetylene cytosine decomposition dust cloud electric discharge energy enzyme equilibrium escape layer evolution example formaldehyde formation formed gases genetic geological glutamic acid glycine H₂ H₂N H₂O hydrocarbons hydrogen cyanide hydrolysis hydrolyzed important inorganic L. E. Orgel limestone living organisms material mechanism membranes metabolism meteorites methane minerals mixture molecules N₂ NH₂ nitrogen nucleic acids nucleotides O₂ obtained occur organic compounds origin oxidation oxygen pathways peptide phosphate phosphorylation photochemical photosynthesis planets polymers polynucleotides polypeptides prebiotic prebiotic synthesis Precambrian present pressure primitive atmosphere primitive earth primitive ocean purines reaction replication rocks Schopf Science sequence solar system structure sugars surface t-RNA temperature ultraviolet light volcanoes yield