Answer:
2 & 4
Explanation:
The theory of spontaneous generation stipulated that life emanated spontaneously from ‘nothing’. This was believed to be true until Francesco Redi & Luis Pasteur later falsified this theory using an experiment. He had two plates of cooked meat. He covered one with a glass bowl and left the other open. The plate with a bowl did not develop maggots while the open one did. This showed that maggot was as a result of hatched eggs that were deposited by flies. Life, therefore, emanates from life.
Answer:
3. Life generated itself from organic matter.
4. Pasteur falsified this notion by a demonstrated experiment.
Explanation:
"Spontangeous generation" refers to a previously-thought process to explain the origin of life in which living organisms were thought to arise from organic, non-living matter and that organisms do not need a 'parent.' This hypothetical process was firstly described 'formally' by Aristotle, but later on, several scientists, like Francesco Redi and Lazzaro Spallanzani, didn't agree to this doctrine but were unable to prove otherwise until Louis Pasteur could.
Louis Pasteur, a French chemist, refuted this notion by performing a series of experiments using 'swan-neck' flasks used to boil broth.
These flasks allowed the entering of oxygen but prevented any microorganisms to have access to them. In his first experiment, when the broth was cooled, it was free of life forms. While in his second experiment, the neck of the flask was broke, thus giving access to life forms to proliferate. At the end of these experiments he concluded: "Life only comes from life."
