Unit 1 Target 2: Spontaneous Generation Quiz

8 Questions | Total Attempts: 1677

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Unit 1 Target 2: Spontaneous Generation Quiz

Questions and Answers
  • 1. 
    Lazzaro Spallanzani and Louis Pasteur both performed experiments hoping to disprove spontaneous generation. What conditions existed in Pasteur’s experiment that did not exist in Spallanzani’s?
    • A. 

      Air could enter the flasks, but no microorganisms could enter.

    • B. 

      No air could enter the flasks, but microorganisms could enter.

    • C. 

      Neither air nor microoganisms could enter the flasks.

    • D. 

      Both air and microorganisms could enter the flasks.

  • 2. 
    John Needham performed an experiment testing spontaneous generation. He boiled chicken broth, placed it in a sterile flask, and then sealed the flask. After a few days, Needham observed microorganisms in the flask. Based on current understanding, how was his experiment flawed?
    • A. 

      Boiling activated dormant microorganisms present in the broth.

    • B. 

      Boiling the broth did not kill all microorganisms present.

    • C. 

      Microorganisms entered the broth from the flask itself after the flask was sealed.

    • D. 

      After Needham boiled the broth, microorganisms entered from the air.

  • 3. 
    Who helped disprove the idea of spontaneous generation by demonstrating that maggots come from fly eggs and NOT from meat?
    • A. 

      Francesco Redi

    • B. 

      John Needham

    • C. 

      Lazzaro Spallanzani

    • D. 

      Louis Pasteur

  • 4. 
    In an experiment, a scientist filled 2 open flasks, as shown in the figures, with broth and boiled the broth until it became clear. He then left the flasks open for several days.Which results would show that spontaneous generation did not occur?
    • A. 

      The broth in both Flasks A and B remained clear.

    • B. 

      The broth in both Flasks A and B became cloudy.

    • C. 

      The broth in Flask A remained clear, and the broth in Flask B became cloudy.

    • D. 

      The broth in Flask A became cloudy, and the broth in Flask B remained clear.

  • 5. 
    Spontaneous generation was offered as an explanation for
    • A. 

      The birth of live offspring from a mother.

    • B. 

      The germination of a seed.

    • C. 

      The appearance of maggots on rotting meat.

    • D. 

      All of the answer choices are correct

  • 6. 
    How did Redi test the hypothesis of spontaneous generation?
    • A. 

      He placed meat in one container and left another container empty. He then observed the containers for the appearance of maggots.

    • B. 

      He placed meat in two containers and covered one of them. He then observed the containers for the appearance of maggots.

    • C. 

      He placed meat in two containers and fly eggs in one of them. He then observed the containers for the appearance of maggots.

    • D. 

      He placed adult flies in two containers, one with meat in it and one without. He then observed the containers for the appearance of maggots.

  • 7. 
    What did Pasteur do in his experiments on spontaneous generation that other scientists before him had not done?
    • A. 

      He boiled the broth in his flasks.

    • B. 

      He sealed his flasks.

    • C. 

      He used curve-necked flasks and left them open.

    • D. 

      He added microorganisms to the broth before he boiled it.

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