Food and Drink from Microorganisms

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  • Created by: Abbie
  • Created on: 12-05-12 09:37

Food and Drink from Microorganisms

Biogenesis

People used to think that life could spontaneously generate from non-living material

Evidence showed that this couldn't be right, the evidence supported the theory that living things are created from other living organisms - biogenesis

Theory was changed to fit available evidence:

  • Before 1765 - was believed substances in food turned into microbes, causing the food to go off
  • A scientist called Lazzaro Spallanzani boiled 2 flasks of broth to kill the microbes, he sealed one flask and left the other open
  • Only the open one went off
  • Showed microbes got into food from air
  • BUT some people just thought it meant that air was necessary to start the change
  • The theory that fresh air caused substances in food to change…

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