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18 Cards in this Set
- Front
- Back
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Define Microbiology |
Study of organisms too small to be seen clearly by the naked eye (microorganisms) like fungi, viruses, etc |
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Define Microorganism |
A living organism that cannot be seen with the naked eye, needs to be viewed with magnification like a microscope. Simple cells that lack complex internal structures. |
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Characteristics of a prokaryotic cell |
No nucleus Small Lacks organelles |
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Characteristics of a eukaryotic cell |
Has nucleus Large Has organelles |
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Characteristics of Viruses |
Not cellular Needs host cell to replicate Small size |
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Microbial involvement in the environment |
Contribute to photosynthesis (light fueled conversion of...) Decomposition (breakdown of dead compounds) |
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Human Uses for Microbes |
Biotechnology Genetic engineering Bioremediation |
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Antony van Leeuwenhoek |
Constructed microscopes Observed and described microorganisms |
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Abiogenesis |
hypothetical generation of life from non-living matter. |
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Biogenesis |
Principle that living organisms develop only from other living organisms. |
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Francesco Redi |
Challenged spontaneous generation by showing that maggots come from fly eggs. |
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Louis Pasteur experiments re spontaneous generation |
Trapped airborne organisms in cotton. Heated necks of flasks and lengthened them, sterilized them. No growth as microorganisms trapped in neck of flask. When broekn, growth. This disproved spontaneous generation. |
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Redi's experiment |
Used jars and meat, covered, with gauze, uncovered to disprove spontaneous generation. |
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Louis Pasteur experiment conclusions |
A sterile solution remains sterile unless contaminated with living organisms. |
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Microscope definition |
Instrument used to see objects that are too small for the naked eye. |
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Antiseptic Techniques and inventor |
By Joseph Lister Disinfecting hands and air in surgical wards with phenol, heat sterilization. |
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Germ theory of disease |
Theory that disease rises from infection by microorgnaisms. |
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Robert Koch |
German microbiologist, contemporary of Pasteur; worked on anthrax, tuberculosis, cholera; developed germ theory of disease. |
