In the Experiments Constructed by Pasteur to Disprove Spontaneous Generation

question 28

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

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Definitions:

Equal Variances

A statistical assumption that the variances of the items being compared are the same across all levels or groups.

ANOVA

ANalysis Of VAriance, a statistical method used to compare the means of three or more samples to find out if at least one is significantly different from the others.

Three or More Populations

Refers to the statistical study or comparison involving more than two distinct groups or sets of individuals/elements.

ANOVA

Analysis of Variance, a statistical method used to compare the means of three or more samples to determine if at least one of the sample means is significantly different from the others.