Answer:
The theory of spontaneous generation was proposed by Aristotle. After Aristotle, many other scientists came in support of this theory.
The theory of spontaneous generation simply explains that the living matter originated from non-living matter. As soon as the theory was brought forward, contradictions arose in the scientific world with some scientists supporting the theory and the others denying it.
Some of the supporters of the spontaneous generation gave an example of how animals such as frogs can only be seen in the muddy areas. They thought that the non- living mud might have gave existence to the frogs.
However, in the future, with more scientific advancements, this theory was proved to be wrong.