bisc 261 Microbiology Ch 1 Test with
Questions with 100% Correct Answers
How did cellular microbes evolve? - Answer -Mutation of DNA led to selected traits
-New genes and genotypes evolved
-Bacteria and Archaea increase genetic pool by horizontal gene transfer within the
same generation
Microbial species terminology - Answer -Eukaryotic microbes fit definition
of reproducing isolated populations
-Bacteria and Archaea do not reproduce sexually and are referred to as strains
--A strain consists of descendants of a single, pure microbial culture
-Binomial nomenclature: Genus and species
, Robert Hooke - Answer Published drawings of the fungus Mucor in his
book, Micrographia
Antony van Leeuwenhoek - Answer First person to observe microorganisms accurately
What is the Theory of Spontaneous Generation? - Answer Idea that living organisms
can develop from nonliving matter
Francesco Redi - Answer Showed that maggots on decaying meat came from fly eggs
John Needham - Answer Performed an experiment:
1. mutton broth in flasks
2. boiled
3. sealed
Results: broth became cloudy and contained microorganisms
-Experiment didn't remain sterile as boiling occurred before sealing (Media didn't
affect outcome, but rather environment the media was kept in)
Lazzaro Spallanzani - Answer Performed an experiment:
1. water and seeds in flasks
2. sealed
3. boiled
Results: no growth of microorganisms
-Experiment remained sterile as boiled occurred after sealing, allowing for no
false readings
Questions with 100% Correct Answers
How did cellular microbes evolve? - Answer -Mutation of DNA led to selected traits
-New genes and genotypes evolved
-Bacteria and Archaea increase genetic pool by horizontal gene transfer within the
same generation
Microbial species terminology - Answer -Eukaryotic microbes fit definition
of reproducing isolated populations
-Bacteria and Archaea do not reproduce sexually and are referred to as strains
--A strain consists of descendants of a single, pure microbial culture
-Binomial nomenclature: Genus and species
, Robert Hooke - Answer Published drawings of the fungus Mucor in his
book, Micrographia
Antony van Leeuwenhoek - Answer First person to observe microorganisms accurately
What is the Theory of Spontaneous Generation? - Answer Idea that living organisms
can develop from nonliving matter
Francesco Redi - Answer Showed that maggots on decaying meat came from fly eggs
John Needham - Answer Performed an experiment:
1. mutton broth in flasks
2. boiled
3. sealed
Results: broth became cloudy and contained microorganisms
-Experiment didn't remain sterile as boiling occurred before sealing (Media didn't
affect outcome, but rather environment the media was kept in)
Lazzaro Spallanzani - Answer Performed an experiment:
1. water and seeds in flasks
2. sealed
3. boiled
Results: no growth of microorganisms
-Experiment remained sterile as boiled occurred after sealing, allowing for no
false readings
