The Origins of Life on the Earth |
From inside the book
Results 1-3 of 86
Page 21
... formed one million or even 100 million years after the formation of the earth . All three dating methods have been ... formed . By analyzing rocks of different ages for their lead isotope content , it is possible by a complicated ...
... formed one million or even 100 million years after the formation of the earth . All three dating methods have been ... formed . By analyzing rocks of different ages for their lead isotope content , it is possible by a complicated ...
Page 144
... formed from mixtures which include aspartic and glutamic acid also contain α - ẞ and a - y amide links , respectively . Abnormal bonds are also formed to the ɛ - amino group of lysine . It has been claimed that the sequences of the ...
... formed from mixtures which include aspartic and glutamic acid also contain α - ẞ and a - y amide links , respectively . Abnormal bonds are also formed to the ɛ - amino group of lysine . It has been claimed that the sequences of the ...
Page 219
... formed about 4.5 to 5.0 × 109 years ago from a diffuse dust cloud . The central part of the dust cloud condensed into the sun , while the outer parts formed the planets . The temperature in the dust cloud at the time when the planets ...
... formed about 4.5 to 5.0 × 109 years ago from a diffuse dust cloud . The central part of the dust cloud condensed into the sun , while the outer parts formed the planets . The temperature in the dust cloud at the time when the planets ...
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