Refer to the Figure Below Illustrating Louis Pasteur's Experiment on Spontaneous

question 173

Multiple Choice

Refer to the figure below illustrating Louis Pasteur's experiment on spontaneous generation. Why was the neck broken on one flask but not the other?

• A) To ensure that conditions were the same in both experimental setups
• B) To prevent contaminants from getting in through the neck
• C) To allow dust to enter into the broken flask but not the unbroken one
• D) To show that the neck of the flask does not introduce an added variable to the experiment
• E) To allow air to enter the control flask