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330 BCE
The theory epigenesis was formed.
Aristotle founded that chicks go through a series of events before their final form. This was founded in 330 BC. He discovered this while he was studying chick embryos. This helps to debunk the spontaneous generation because it is showing how something is growing and changing, and not just showing up.
This is the source.
https://embryo.asu.edu/pages/aristotle-384-322-bce#:~:text=Through%20his%20study%20of%20chick,a%20theory%20later%20called%20epigenesis. -
The microscope was invented
Zacharias Janssen invented the microscope in 1590. (Thought to be assisted by William Boreel) This helps cell theory because they could not see anything smaller than the width of a human hair. This mean they could not see cells. This does support the idea of spontaneous generation because it shows cells, but no one know where the cells come from.
The source I used.
Who Invented the Microscope? | Live Science
www.livescience.com › 39649-who-invented-the-microsc… -
The process of photosynthesis was discovered
The process of photosynthesis was discovered by Jean Baptist Van Helmont in the 1600s. He did this by conducting an experiment that took 5 years. He measured a willow tree, and after the 5 years he weighed it again and realized that is had weighed a lot more than when he had planted it due to photosynthesis.
https://www.bbc.co.uk/bitesize/guides/zq8s2nb/revision/4 -
Plant cells were Discovered
Robert Hooke discovered plant cells that led to the understanding of cells, the smallest units of life. He did this in 1665. This did not help lead to the idea of spontaneous generation because it helped better understand the cells and how they were made.
Sources
History of the Cell: Discovering the Cell | National Geographic …
www.nationalgeographic.org › article › history-cell-disco...
The microscopic science of Robert Hooke | Britannica
www.britannica.com › video › Overview-scientist-Robert-. -
Spontaneous Generation was disproved.
This was disproven in 1668 by Louis Pasteur. He was able to disprove it, and that led to the making of various vaccines. He disproved it by isolating certain foods, to see if maggots will appear on the food. He then realized that flies would land on the meat and would lay their eggs, which turned into maggots. https://www.britannica.com/biography/Louis-Pasteur -
Bacteria was Discovered
Anton van Leeuwenhoek discovered bacteria in 1676. He also discovered blood cells, microscopic nematodes and sperm. This does not support the theory of spontaneous generation because it is showing what blood is made of and how it is made.
History - Historic Figures: Antonie van Leeuwenhoek (1632 ... - BBC
www.bbc.co.uk › history › van_leeuwenhoek_antonie -
Discovery of cells being made of/ Originated from cells.
Lorenz Oken made the discovery that cells were made up of other cells, and originated from cells, which is now the first step of cell theory. This was discovered in 1805
This is the source
http://fig.cox.miami.edu/~cmallery/150/unity/cell.text.htm#:~:text=German%20natur%2Dphilosopher%20and%20microscopist,in%20medicine%20at%20Freiburg%20University.&text=It%20is%20reported%20that%20in,statement%20of%20a%20cell%20theory. -
The Nucleus was Discovered
Robert Brown was a scientist that discovered the nucleus when looking at a plant cell. It is important to the cell theory because it helped determine the second half of the cell theory. He noticed the nucleus and how it functioned like a brain would, and directed everything that was happening in the brain. This did not lead to the idea of spontaneous generation because it is showing how the cells function.
Source
https://study.com/academy/lesson/robert-brown-cell-theory-inventions- -
The Cell Theory was Founded.
With the help of Matthias Schleiden, Theodor Schwan proposed the cell theory, which is plant, and animal tissues are composed of cells, and all cells are identical within that organism. His did not contribute to the thought of spontaneous generation, because it is explaining how the plant or animal is alive, and that it did not just come out of no where.
Source.
https://www.encyclopedia.com/people/science-and-technology/cell-biology-biographies/theodor-schwann -
Humans are composed of cells form end to end.
This was discovered by Albert von Roelliker found out that the human body was made of cells through and through. He discovered that sperm and eggs are also cells, and form to make other cells.
https://bitesizebio.com/166/history-of-cell-biology/#:~:text=1838%20%E2%80%93%20Schleiden%20and%20Schwann%20proposed,egg%20cells%20are%20also%20cells. -
Was made clear that disease occures at the cellular level.
Rudolf Virchow made it so it was easier to diagnose diseases. He did this in 1855. This did not lead to the idea of spontaneous generation because this theory was used to explain where diseases came from.
Source
https://study.com/academy/lesson/rudolf-virchow-discovery-cell-theory-contributions.html#:~:text=Virchow%20used%20the%20theory%20that,to%20diagnose%20diseases%20more%20accurately.