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Who demonstrated that life originated from pre-existing cells?
- a)Louis Pasteur
- b)Hugo de Vries
- c)Charles Darwin
- d)Stanley Miller
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Who demonstrated that life originated from pre-existing cells?a)Louis ...
- Louis Pasteur in his swan neck flask experiment, found out that life originated from pre-existing life.
- He prepared sterilized syrup of sugar and later killed yeast by boiling them in flasks.
Most Upvoted Answer
Who demonstrated that life originated from pre-existing cells?a)Louis ...
Louis Pasteur demonstrated that life originated from pre-existing cells by conducting experiments known as the swan-neck flask experiments:
- Spontaneous Generation Theory: Before Pasteur's experiments, the prevailing belief was in the theory of spontaneous generation which proposed that living organisms could arise from non-living matter.
- Swan-Neck Flask Experiments: Pasteur conducted a series of experiments using swan-neck flasks filled with nutrient broth. The flasks had curved necks that allowed air to enter but prevented dust and microorganisms from reaching the broth.
- Results: Pasteur observed that no microbial growth occurred in the broth as long as the necks remained intact, even though the flasks were exposed to air. This demonstrated that the microorganisms present in the air were responsible for contaminating the broth.
- Conclusion: Pasteur's experiments conclusively disproved the theory of spontaneous generation and provided strong evidence for the concept of biogenesis, which states that life only arises from pre-existing life.
- Significance: Pasteur's work laid the foundation for the field of microbiology and revolutionized our understanding of the origin of life. His experiments were crucial in establishing the principles of sterilization and aseptic techniques in various fields, including medicine and food preservation.
- Spontaneous Generation Theory: Before Pasteur's experiments, the prevailing belief was in the theory of spontaneous generation which proposed that living organisms could arise from non-living matter.
- Swan-Neck Flask Experiments: Pasteur conducted a series of experiments using swan-neck flasks filled with nutrient broth. The flasks had curved necks that allowed air to enter but prevented dust and microorganisms from reaching the broth.
- Results: Pasteur observed that no microbial growth occurred in the broth as long as the necks remained intact, even though the flasks were exposed to air. This demonstrated that the microorganisms present in the air were responsible for contaminating the broth.
- Conclusion: Pasteur's experiments conclusively disproved the theory of spontaneous generation and provided strong evidence for the concept of biogenesis, which states that life only arises from pre-existing life.
- Significance: Pasteur's work laid the foundation for the field of microbiology and revolutionized our understanding of the origin of life. His experiments were crucial in establishing the principles of sterilization and aseptic techniques in various fields, including medicine and food preservation.
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Who demonstrated that life originated from pre-existing cells?a)Louis Pasteurb)Hugo de Vriesc)Charles Darwind)Stanley MillerCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Who demonstrated that life originated from pre-existing cells?a)Louis Pasteurb)Hugo de Vriesc)Charles Darwind)Stanley MillerCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Who demonstrated that life originated from pre-existing cells?a)Louis Pasteurb)Hugo de Vriesc)Charles Darwind)Stanley MillerCorrect answer is option 'A'. Can you explain this answer?.
Who demonstrated that life originated from pre-existing cells?a)Louis Pasteurb)Hugo de Vriesc)Charles Darwind)Stanley MillerCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Who demonstrated that life originated from pre-existing cells?a)Louis Pasteurb)Hugo de Vriesc)Charles Darwind)Stanley MillerCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Who demonstrated that life originated from pre-existing cells?a)Louis Pasteurb)Hugo de Vriesc)Charles Darwind)Stanley MillerCorrect answer is option 'A'. Can you explain this answer?.
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