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Question
Which of the following theory was disapproved by swan neck experiment of Louis Pasteur?
Which of the following theory was disapproved by swan neck experiment of Louis Pasteur?
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Solution
The correct option is B Spontaneous generation theory
Louis Pasteur designed several bottles with S-curved necks . A nutrient enriched broth was added in one of the bottles and it was boiled. Life was not seen in the jar for a year. Then the bottle was tilted exposing the inner content more directly to the air in the swan neck and life-forms were seen in the broth in few days. It was concluded that as long as dust and other airborne particles were trapped in the S-shaped neck of the bottle, no life was created. But on on tilting the bottle the medium came in contact with the air trapped in the S- shape of the bottle's opening and life forms grew. This experiment by Louis Pasteur disapproved the Spontaneous generation theory which stated that life was generated from inanimate matter. Thus the correct answer is option C.
Louis Pasteur designed several bottles with S-curved necks . A nutrient enriched broth was added in one of the bottles and it was boiled. Life was not seen in the jar for a year. Then the bottle was tilted exposing the inner content more directly to the air in the swan neck and life-forms were seen in the broth in few days. It was concluded that as long as dust and other airborne particles were trapped in the S-shaped neck of the bottle, no life was created. But on on tilting the bottle the medium came in contact with the air trapped in the S- shape of the bottle's opening and life forms grew. This experiment by Louis Pasteur disapproved the Spontaneous generation theory which stated that life was generated from inanimate matter. Thus the correct answer is option C.
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