Timeline by Alejandra Dom�nguez Garc�a https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe Cell origin theories and scientists involved en-us 2024-04-26 15:57:24 UTC 2024-05-17 03:34:54 UTC hello@padlet.com https://padlet.net/icons/png/1f58c.png References: alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971419444 Vedantu. (n.d.). The term "classification" was coined by whom? Vedantu. https://www.vedantu.com/question-answer/the-term-classification-was-coined-by-a-class-11-biology-cbse-5f86f76c177aeb6799e573ae#:~:text=Theophrastus%20categorized%20plants%20into%20four,his%20book%20%22Historia%20Plantarum%22.


CSIC. (n.d.). Museo virtual Gregor Mendel. Consejo Superior de Investigaciones Científicas. https://museovirtual.csic.es/salas/mendel/m3.htm


BYJU'S. (n.d.). Spontaneous generation theory. BYJU'S. https://byjus.com/biology/spontaneous-generation-theory/


Encyclopædia Britannica. (n.d.). Abiogenesis. In Encyclopædia Britannica. Retrieved [2024, april 26th], from. https://www.britannica.com/science/abiogenesis


Discover Magazine. (n.d.). How cell membranes may have kicked off the origin of life. Discover Magazine. Retrieved [2024, april 26th], from https://www.discovermagazine.com/environment/how-cell-membranes-may-have-kicked-off-the-origin-of-life


LibreTexts. (n.d.). The endosymbiotic theory. In Microbiology (Kaiser). LibreTexts. Retrieved [insert date], from https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(Kaiser)/Unit_4:_Eukaryotic_Microorganisms_and_Viruses/07:_The_Eukaryotic_Cell/7.8:_The_Endosymbiotic_Theory


]]> 2024-04-26 15:58:33 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971419444 384-322 BC: Spontaneous generation theory was firstly recorded by greek philosopher, Aristotle; this theory stated that life came from nonliving matter because of a material called pneuma. . alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971429725 2024-04-26 16:09:24 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971429725 371-287 BC: Theophrastus, astrologist and alquimist, also contributed to this theory: stating that plants grow spontaneously from seeds, or other parts of the plant, showing that factors as sun and climate only improved their growth. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971445880 2024-04-26 16:26:01 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971445880 1493-15921: Paracelsus, with diverse opinions regarding his biology and philosophical works, believed in spontaneus generation, which produced small animals from herbs by putrefaction. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971455387 2024-04-26 16:35:49 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971455387 1626- 1697: Francisco Redi, dismissed the veracity of the spontaneous generation theory, until date, widely accepted by the scientific community; with his experiment of observation of two flasks with meat broth, one closed and the other one open, he demonstrated that maggots only appeared in the open fask, showing that flies were causing the organisms. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971467218 2024-04-26 16:48:21 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971467218 1768: Italian biologist, Lazzaro Spallanzani repeated Needham's experiment with broths. He boiled them, sealing one jar and leaving another open. He found that only the open jar developed microbial growth, suggesting that air introduced the microbes.His experiment disapproved Spontaneous generation theory completely. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971690282 2024-04-26 23:00:36 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971690282 1859: Louis Pasteur, a French microbiologist, conducted and experiment with flasks designed to allow air exchange but prevent microorganism entry; the broth became cloudy. Pasteur's experiment proved that microbial growth in broth was not due to spontaneous generation, instead, to introduction of microorganisms from the air. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971691481 2024-04-26 23:04:53 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971691481 20th century approx: Panspermia; this theory for cell origin, proposed that life on Earth may have started from microorganisms or biochemical substances delivered to our planet via comets, meteorites, or interstellar dust particles. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971692647 2024-04-26 23:09:09 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971692647 20th century approx: Hydrothermal Vent Hypothesis; this hypothesis proposed that life originated at hydrothermal vents on the ocean floor, creating early life forms. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971693192 2024-04-26 23:11:02 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971693192 1960s: RNA World Hypothesis; The RNA World hypothesis states that life may have originated from self-replicating RNA molecules, which altogether became earth-life forms. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971693771 2024-04-26 23:13:14 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971693771 1953: the Miller-Urey experiment simulated early Earth conditions, showing that organic molecules like amino acids, crucial for life, could arise abiogenically from inorganic compounds. This supported Oparin and Haldane's ideas, demonstrating the potential for life's chemical origins to be scientifically tested. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971695136 2024-04-26 23:18:39 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971695136 Non specified date: Membrane/protocell; this hypothesis stated the formation simple, membrane-bound structures;These structures could have encapsulated organic molecules, potentially showing the development of cellular functions and, eventually, more complex life forms. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971697149 2024-04-26 23:26:32 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971697149 1905 and 1910: The endosymbiotic theory stated that some organelles found in eukaryotic cells today, used to be microbes working independently (prokaryotes). 3 principal proved evidences sustain these: Mitochondria and chloroplasts are the same size as prokaryotic cells and divide by binary fission; mitochondria and chloroplasts have their own DNA which is circular, not linear.;mitochondria and chloroplasts have their own ribosomes which have 30S and 50S subunits, not 40S and 60S. alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971699047 2024-04-26 23:33:08 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971699047 alejandradominguezg1 https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971701512 2024-04-26 23:41:31 UTC https://padlet.com/alejandradominguezg1/qst8c0rwjfcf66pe/wish/2971701512