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Questions and Answers
What did Needham observe in his experiment with the cloudy broth?
What did Needham observe in his experiment with the cloudy broth?
- Clear liquid without any signs of growth
- Large visible organisms
- Numerous microscopic creatures (correct)
- No changes in the broth
Why did Spallanzani's heated but sealed flasks remain clear?
Why did Spallanzani's heated but sealed flasks remain clear?
- The flasks were not heated properly
- No air was allowed to enter the sealed flasks (correct)
- Spallanzani contaminated the flasks
- The flasks were opened to the air after heating
What concept did Rudolf Virchow introduce to counter spontaneous generation?
What concept did Rudolf Virchow introduce to counter spontaneous generation?
- Organisms can emerge from non-living matter
- Theory of Biogenesis (correct)
- Spontaneous generation is the only source of new organisms
- Spontaneous generation is possible under controlled conditions
Why did Louis Pasteur use S-shaped flasks in his experiment?
Why did Louis Pasteur use S-shaped flasks in his experiment?
What was a key difference between Needham's and Spallanzani's experiments?
What was a key difference between Needham's and Spallanzani's experiments?
Why did arguments about spontaneous generation persist until Louis Pasteur's experiment?
Why did arguments about spontaneous generation persist until Louis Pasteur's experiment?
Which theory posited that certain types of organisms could arise from non-living matter?
Which theory posited that certain types of organisms could arise from non-living matter?
Who conducted an experiment involving meat and maggots that challenged the theory of spontaneous generation?
Who conducted an experiment involving meat and maggots that challenged the theory of spontaneous generation?
Which scientist's experiment involved boiling broth in flasks and demonstrating that microbes did not arise spontaneously?
Which scientist's experiment involved boiling broth in flasks and demonstrating that microbes did not arise spontaneously?
Why did people once accept the theory of spontaneous generation as an explanation for certain types of organisms' existence?
Why did people once accept the theory of spontaneous generation as an explanation for certain types of organisms' existence?
How did Lazzaro Spallanzani's experiments contribute to challenging the theory of spontaneous generation?
How did Lazzaro Spallanzani's experiments contribute to challenging the theory of spontaneous generation?
Who is credited with popularizing the concept of cell theory by stating 'all cells arise from cells'?
Who is credited with popularizing the concept of cell theory by stating 'all cells arise from cells'?
Which scientist observed protozoa in rainwater and bacteria in the human mouth and intestine?
Which scientist observed protozoa in rainwater and bacteria in the human mouth and intestine?
What did Francesco Redi's experiment with jars demonstrate regarding the formation of maggots?
What did Francesco Redi's experiment with jars demonstrate regarding the formation of maggots?
In John Needham's experiment, he boiled broth infused with plant or animal matter to support which theory?
In John Needham's experiment, he boiled broth infused with plant or animal matter to support which theory?
What was the outcome of Spallanzani's experiment that countered Needham's results?
What was the outcome of Spallanzani's experiment that countered Needham's results?
'Omnis cellula a cellula' is a phrase associated with which scientist's contribution to cell theory?
'Omnis cellula a cellula' is a phrase associated with which scientist's contribution to cell theory?
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