SCI8B 5.04 Redi and Pasteur Experiments SY2324

What hypothesis did Redi’s experiment test?

• spontaneous generation

• theory of evolution

• survival of the fittest

• cell theory

What hypothesis did Pasteur make to test?

• If flies can only come from flies, then they will not appear on covered meat.

• If flies can come from rotting meat, then they will appear on covered meat.

• If cells can develop from non-living things, then cells can appear in sterile broth.

• If cells can appear in sterile broth, then cells can only develop from living things.

What was the control in Redi’s experiment?

• a straight neck flask to allow air to get in

• a swan neck flask that prevented air from getting in

• meat covered by jars that didn’t have contact with air

• uncovered meat that had contact with air

What was the variable in Pasteur's experiment?

• a straight neck flask to allow air to get in

• a swan neck flask that prevented air from getting in

• meat sealed in jars that didn’t have contact with air

• uncovered meat that had contact with air

What did Redi find in his experiment?

• Flies were found in all of the sealed and unsealed jars of rotting meat.

• Flies were not found in the sealed jars of rotting meat.

• Both broths contained living organisms.

• Only the broth with the flask open to the air contained living organisms.