In the Experiments Constructed by Pasteur to Disprove Spontaneous Generation

question 16

Multiple Choice

In the experiments constructed by Pasteur to disprove spontaneous generation, swan-necked flasks were used.Why was this shape of flask used in this experiment?

• A)The shape of the glass neck allowed the bacteria into the flask and then into the media, but air could not enter.
• B)The glass necks needed to be open to the air, yet constructed so that bacteria would settle in the lowest part of the neck.
• C)These flask shapes were the easiest and cheapest to produce.
• D)Because the glass necks were stretched out, the heat used to sterilize the medium inside of the flask could not kill the bacteria in the neck.

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