Food and Drink from Microorganisms
- Created by: Abbie
- Created on: 12-05-12 09:37
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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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