Question

multiple choice question
how did john tyndall (1820-1893) provide evidence against spontaneous generation?

he showed that dust does carry microbes.

he showed that microbes failed to grow in sealed flasks.

he showed that microbes failed to grow in open flasks with curved necks.

he discovered that maggots on decaying meat resulted from the presence of fly eggs.

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Explanation:

John Tyndall's experiments demonstrated that dust in the air was the carrier of microbes, and by eliminating dust (via his tyndallization process and dust-free air setups), microbial growth was prevented, directly countering the idea of spontaneous generation. The curved-neck flask experiment is associated with Louis Pasteur, sealed flask tests were done by earlier scientists, and the maggot-meat experiment was from Francesco Redi.

Answer:

He showed that dust does carry microbes.