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Este Cmap, tiene información relacionada con: Deighton HOA 2 Abiogenesis, Primordial Soup: In the 1920 Alexander Oparin proposed this theory. It states that early conditions on earth were much different than today. Basically a liquid mix of basic chemical such as methane and when energy was added organic molecules were formed without the presence of oxygen was given credence by Miller-Urey Experiment: In 1952 Stanley Miller and Harold Urey conducted and experiment simulated earths early condition by putting chemicals in a sterile and sealed system and then adding energy. They found that amino acids formed. This theory lacks an explanation beyond "organic molecules", Protocells is the theoretical First Living Cell, how life on Earth could have arisen from inanimate matter need explain multiple steps Organic Molecules, Iron-sulfur world theory (1980's) (Wächtershäuser's hypothesis) are very similar and state Organic Molecules were first formed through Redox reactions at high temperature and high pressure in either deep sea or volcanic vents, Theories that will successfully explain how life on Earth could have arisen from inanimate matter, Organic Molecules were created from either Terrestrial Sources, Extra Terrestrial Sources have some theories that have been gaining traction as additional evidence is gathered "Primitive" extraterrestrial life: proposes that primitive extraterrestrial life formed on Mars or elsewhere beyond earth and hitched a ride on a comet to earth. This doesn't explain how life formed just that it did elsewhere. Some meteorite evidence and lab experiments seem to support this collection of theories. (late 70's, and 2001), Replication Models argue that genes came first RNA World Hypothesis states that the early Earth had self replicating and catalytic RNA but no DNA or Proteins. Many hypothesis and model speculate the "jump" to protocells. Ideas included "spontaneous generation of a cell membrane, or chemical reactions in clay., Terrestrial Sources have many theories Thermodynamic Origin of Life A big complicated theory that looks at RNA and DNA replication under intense wavelengths of Ultraviolet light (2005)., Theories that have been discarded Spontaneous Generation: Was the belief from early Greek time until the mid 19th century that life arose from inanimate matter See Trevor Deighton HOA 1: Spontaneous Generation, Terrestrial Sources have many theories Iron-sulfur world theory (1980's) (Wächtershäuser's hypothesis), Theories that are less developed or less credible Autocatalysis:1993 Stuart Kauffman proposed that life initially arose as autocatalytic chemical networks, Extra Terrestrial Sources could be responsible for Protocells, Terrestrial Sources have many theories Radioactive beach hypothesis (states that increased tidal pressures may have concentrated radioactive particle at the high water mark and that the energy from radio activity could have generated organic molecules (Z. Adams 2004, J. Parnell 2007), Theories that are less developed or less credible Gold's "Deep-hot biosphere" model (1970's): states that life formed deep within the earth, Theories have not successfully demonstrated how Abiogenesis, Protocells theories are organized by which came first Replication Models, The deep sea vent theory are very similar and state Organic Molecules were first formed through Redox reactions at high temperature and high pressure in either deep sea or volcanic vents, Theories that are less developed or less credible Multiple genesis states that different forms of life arose simultaneously and are either hidden or destroyed. (multiple dates), Metabolism Models argue that primitive metabolism came first and then RNA replication afterwards Iron-Sulfur World Theory