• Anton Van Leeuwennoek

    Anton Van Leeuwennoek
    Discovered the "invisible" microorganisms and best known for the improvement of the microscope. Leaned more towards spontaneous generation
  • Francesco Redi

    Francesco Redi
    Redi was the first scientist to challenge the theory of spontaneous generation by demonstrating that maggots come from flies eggs
  • John Needham

    John Needham
    Needham experimented with gravy and then with wheat. This was used to experiment with spontaneous generation
  • Lazarro Spallanzani

    Lazarro Spallanzani
    Interpreting digestion, the process of chemical solution, and helped disprove the concept of spontaneous generation. He believed in biogenesis.
  • Edward Jenner

    Edward Jenner
    Founder of the smallpox vaccine.
  • Charles Chamberland

    Charles Chamberland
    He developed the Chamberland filter, a device of an unglazed porcelain bar. The filter had pores that were smaller than bacteria, which made it possible to pass a solution containing bacteria through the filter and have the bacteria completely removed from the solution.
  • Rudolf Virchow

    Rudolf Virchow
    Challenged the case for a spontaneous generation with the concept of biogenesis. He had a hypothesis that living cells only arose from preexisting living cells
  • Louis Pasteur

    Louis Pasteur
    Pasteur demonstrated that microorganisms are present in the air and can contaminate sterile solutions, but that air itself does not create microbes. Leans towatds biogenisis
  • Joseph Lister

    Joseph Lister
    He successfully introduced carbolic acid to sterilize surgical instruments and clean wounds. Leans more towards biogenesis.
  • Robert Koch

    Robert Koch
    Discovered rod-shaped bacteria in the blood of cattle that had died of anthrax. Biogenesis.
  • Franny Hesse

    Franny Hesse
    Introduce the agar plate as a solidifying gel for the culturing medium. Biogenesis
  • Paul Ehrlich

    Paul Ehrlich
    Fired the first shot in the chemotherapy revolution and speculated about a "magic bullet". Later he found a chemotherapeutic agent called salvarsan. Bengenesis.
  • Alexander Fleming

    Alexander Fleming
    Discovered the antibiotic penicillin. Leans towards biogenesis
  • Rebecca Lancefield

    Rebecca Lancefield
    Proposed that streptococci be classified according to serotypes based on certain components in the cell walls of the bacteria. Biogenesis
  • Wendall Stanley

    Wendall Stanley
    Demonstrated that the organism, called the tobacco mosaic virus, was different from other microbes. Leaned towards biogensis
  • George W. Beadle. Edward L. Tatum

    George W. Beadle. Edward L. Tatum
    Demonstrated the relationship between genes and enzymes. Leans towards biogenesis
  • Oswald T. Avery, Colin M. MacLeod, and Maclyn McCarty

    Oswald T. Avery, Colin M. MacLeod, and Maclyn McCarty
    The Avery–MacLeod–McCarty experiment was an experimental demonstration showing that DNA is the substance that causes bacterial transformation. Leans towards biogenesis
  • James Watson and Francis Crick

    James Watson and Francis Crick
    Proposed a model for the structure and replication of DNA. Biogenesis
  • Francois Jacob and Jscques Monod

    Francois Jacob and Jscques Monod
    Discovered messenger RNA, a chemical involved in protein synthesis. After, generations of debating if cells come from spontaneous generation or biogenesis. Jacob and Monod leaned towards the biogenesis aspect of microbiology.
  • Paul Berg

    Paul Berg
    Showed that fragments of human or animal DNA that code for important proteins can be attached to bacterial DNA. Berg leaned more towards the biogenesis aspect of microbiology.