bio - A ll cells come from pre existing cells One cell can...

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One cell can divide to form two So where did the cells come from?? - we all strrated from a single cell zygote, but we don’t know where it came from Life come from non-life? - theory of spontaneous generation - Life from non living matter - Exp litter dirt manure dead flesh (meat) - A key event was not observed but evidence supports the theory Larger animals arise spontaneous as well Mice from a dirty underwear and wheat Francesco Redi: covered meat, macroscopic organisms One of the first evidence that Disproves ( he covered the meat in a jar dis allowing the flys to lay their eggs on it) John Needhan Boiled a butrient broth ( boiling kills but if left in the opening will allow microorganisms) Lazzano Spallanzine: He copied john’s experiment: Two open flasks with nutrient broth One is boiled>>> contamination and cloudy But Spallazine: sealed the flask, after boiling the broth, he found no growth! Therefore no oxygen, it might seem like good evidence
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bio - A ll cells come from pre existing cells One cell can...

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