In Order to Disprove the Theory of Spontaneous Generation,Louis Pasteur

question 22

Multiple Choice

In order to disprove the theory of spontaneous generation,Louis Pasteur

• A)heated nutrient broth in a stoppered flask to show that microorganisms could not grow.
• B)heated nutrient broth in an open flask.
• C)heated nutrient broth in a swan-necked flask so that microorganisms could not enter.
• D)excluded oxygen from the flask.
• E)filtered the nutrient broth in the flask before heating.

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