2. Disproving Spontaneous Generation
Pasteur's Experiments on Spontaneous Generation
2. Disproving Spontaneous Generation
Pasteur's Experiments on Spontaneous Generation
1
concept
Pasteur's Experiments on Spontaneous Generation
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2
Problem
ProblemLouis Pasteur designed swan-necked flasks to:
A
Keep maggots away from decaying meat.
B
Pasteurize beer and wine.
C
Trap microorganisms from the air in the neck of the flask.
D
Allow dust to reach sterile infusions.
3
Problem
ProblemWhy did Pasteur design swan-necked flasks in his experiments on spontaneous generation?
A
The neck excluded oxygen from entering the flask.
B
The neck stopped microorganisms in the air from contaminating the contents of the flask.
C
The neck excluded flies and maggots from entering the flask.
D
The neck served as a handle when heating the flask.
E
The neck prevented Pasteur from contaminating his sample by sneezing on it.
4
concept
Pasteur’s Swan-Neck Experiment
5m
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Problem
ProblemWhich of the following is not a valid conclusion and/or outcome of Pasteur's experiment refuting the theory of spontaneous generation?
A
That microorganisms are present everywhere, even in the air.
B
The development of aseptic techniques when working with microbial cultures.
C
Microorganisms can cause disease.
D
Living cells can only develop from pre-existing cells.