Microbiology experiments: Redi and Pasteur

What was Francesco Redi's hypothesis about maggots on meat?

• Maggots are produced by rotting meat.

• Maggots are produced by flies.

• Maggots appear spontaneously.

• Maggots are produced by bacteria.

What did Redi use to test his hypothesis?

• Two pieces of meat on a table.

• Two jars with fresh meat, one covered and one uncovered.

• Two pieces of meat, one in a jar and one on a table.

• Two jars with rotting meat, one covered and one uncovered.

What was the result of Redi's experiment?

• Maggots appeared only in the uncovered jar.

• Maggots appeared in both jars.

• Maggots appeared only in the covered jar.

• No maggots appeared in either jar.

Tags

NGSS.MS-LS1-5

What conclusion did Redi draw from his experiment?

• Maggots are produced by rotting meat.

• Maggots appear spontaneously.

• Maggots are produced by bacteria.

• Maggots are produced by flies.

What did Louis Pasteur's 'swan neck flask' experiment demonstrate?

• Microbes are needed for decay to occur.

• Microbes appear spontaneously.

• Microbes are produced by boiling.

• Microbes are produced by nutrient broth.

What was used as the 'nutrient broth' in the model of Pasteur's experiment?

• Chicken stock

• Vegetable broth

• Fish stock

• Beef broth

What was the independent variable in the model of Pasteur's experiment?

• Amount of broth used

• Access of airborne microbes to the stock

• Boiling time of the broth

• Type of broth used

What was the dependent variable in the model of Pasteur's experiment?

• Type of broth used

• Microbial growth in the form of color change and clarity of the stock

• Access of airborne microbes to the stock

• Boiling time of the broth

What did the results of the model of Pasteur's experiment indicate?

• Microbes are needed for decay to occur.

• Microbes are produced by nutrient broth.

• Microbes appear spontaneously.

• Microbes are produced by boiling.

What theory did Pasteur's experiment support?

• Spontaneous Generation Theory

• Germ Theory of Disease

• Theory of Evolution

• Cell Theory