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The Theories of the Origin of Life
Transcript of The Theories of the Origin of Life
As has been proven in the archeabacteria which can survive at temperatures of up to 200ºC and pressure up to 350 atmospheres. Clay was abundant in pre-biotic Earth. Composed of silicate crystals. Clay in water or mud, could serve as a step where organic life originates from inorganic matter. Sticky clay crystals traps molecules onto their surfaces - Surface properties of silicate crystals serve as catalyst for monomers, allowing for creation of complex organic molecules. The complex molecules then replicate independently. In the 5th century Thales of Miletus establish this theory that life was originated in mud with the combination of the elements (fire,water,air..etc) without God’s intervention. Then in the 4th century Plato and Aristotle established that life came from the dew, sea water, sweat or humid soil. Entelechy that is a supernatural force capable to give life to things that are not alive. For thousands of years mankind has tried to figure out where we came from and over the years various theories have emerged. Although several have been proved to be wrong many of them still prevail. These are the best or most popular theories of the origin of living beings: All the worlds religions Panspermia - Anaxagoras, Arrhenius, Helmholtz Physical-Chemical - John Haldane
Alexander Ivanovich Deep Gas Theory - Graham Cairns-Smith Spontaneous Generation - Thales of Miletus
Aristotle The idea that life on Earth had an extra-terrestrial origin may be traced back to the ancient Greek philospher Anaxagoras, who lived in the fifth century B.C. Anaxagoras claimed that the universe is made of an infinite number of spermata (seeds). Svante August Arrhenius Herman Ludwig von Helmholtz In 1921, Alexander Ivanovich Oparin concluded that the formation of the first organic compounds had an abiotic origin and had been generated from inorganic substances present in the atmosphere, which made it reductive and resulted in the formation of organic compounds dissolved in primitive seas and produced coacervates (a tiny spherical droplet of assorted organic molecules (specifically, lipid molecules) which is held together by hydrophobic forces from a surrounding liquid). Oparin and Haldane In 1924, John Haldane got
similar conclusions to Oparin by pointing out that, when gases from the primitive atmosphere reacted to the Sun’s ultraviolet rays, a great quantity of biomolecules, like sugar and amino acids, were formed.
This is considered a
Theory Clay Theory - They believed that the mud created fish, and the meat when decomposing produced flies because that was they observed. In the 19th century Louis Pasteur establish that microorganisms die when exposed to heat & that they can’t come from a combination of airborne germs. A lot of scientists believed this theory until the microscope was created. Thomas Gold Graham Cairns-Smith Graham Cairns-Smith defines this theory as life producers - “mud organisms” that are clay silicate crystals that replicate, grow and evolve through natural selection; including organic molecules and RNA types. Omne vivum ex vivo
Latin for "all life [is] from life." Modern theories state that the life arose on the early earth by a series of progressive biochemical reactions.
This idea was called biopoiesis, the process of living matter evolving from self-replicating but nonliving molecules.
Due to intermolecular attraction they became capable of growth and division. + many more...