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ª T cell: in 1768 tested espallanzani ke microbes came from the air and could be removed by boiling. But it was not till 1861 that Pasteur carried out a series of elegant experiments tested ke ke organisms such as fungi and bacteria do not appear in the media rich in nutrients for themselves in non-living materials. Oparin until 1924 does not make any real progress when Oparin experimentally showed that atmospheric O2 prevented the synthesis of organic molecules are necessary constituents ke for the emergence of life. In the same year, Haldane suggested ke tb pre-biotic oceans of the Earth would have formed a [hot dilute soup] in which organic compounds, the elementary constituents of life may have been formed. This idea was called biopoesis, ie the process by which living matter arises from self-replicating but nonliving molecules.