Biogenesis

Biogenesis: 

Spontaneous generation: before the 1600's, the thought that organisms could arise from nonliving things.

Redi's experiments: 

• 1688 showed that rotting meat kept away from flies would not produce flies 
• maggots appeared only on meat that had been exposed to flies
• image of experiment

Spallanzi's experiments: 

• 1700
• Microorganisms would not grow in broth when its container was heated then sealed. 
• Inferred that microorganisms do not arise spontaneously but, rather, are carried in the air 
• Image of the experiment 

Pasteur's experiment 

• 1860's
• variation of spallanzi's design 
• prove that microorganisms are carried in the air and do not arise by spontaneous generation 
• * Finally disproved it 
• image of experiment