HOW DID LIFE BEGIN ON THE PLANET? by Xiomara Gualan naula https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu Hecho con salero en-us 2021-11-10 14:41:19 UTC 2021-11-10 16:00:55 UTC hello@padlet.com https://padlet.net/icons/png/1f30e.png The question of how life began on Earth is one of the most difficult (and interesting) that can be posed. In fact, the origin of living beings involves several key questions: when did it occur? Could it occur more than once? How was the transition between chemistry and biology? Did it take place on Earth or outside she? And, halfway between science and philosophy: was it the result of chance or necessity? gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881666006 2021-11-10 15:39:39 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881666006 gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881678248 2021-11-10 15:43:33 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881678248 The age of our planet is estimated at about 4,570 million years (Ma). Initially, their temperatures were extremely high and incompatible with the stability of biological molecules. It was not until approximately 3,850 Ma that conditions began to be stable and favorable for life. gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881683530 2021-11-10 15:45:16 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881683530 HOW DID LIFE BEGIN ON THE PLANET? gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881687422 2021-11-10 15:46:33 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881687422 As early as the 1920s, the hypotheses of Oparin and Haldane suggested that the first step in the origin of life was the synthesis of organic molecules in the primitive atmosphere, using ultraviolet light from the sun as energy. Those molecules would accumulate in shallow lakes or seas. There they would combine to give rise to the so-called primordial soup, the basis for synthesizing more complex molecules that would facilitate the appearance of cellular life. gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881697329 2021-11-10 15:49:53 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881697329 This theory was greatly reinforced in 1953, when Stanley Miller performed his famous experiment. It consisted of neither more nor less than introducing into a chamber a mixture of gases similar to that which was believed to make up the primitive atmosphere. After supplying energy by means of electric discharges, the gases reacted and gave rise to several of the basic components of living matter, thus demonstrating that their synthesis under abiotic conditions was possible. gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881704877 2021-11-10 15:52:23 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881704877 https://www.youtube.com/watch?v=de1hiS_XjWg gualanxiomara289 https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881712442 2021-11-10 15:54:48 UTC https://padlet.com/gualanxiomara289/j1yhtbbi5s2mh9cu/wish/1881712442