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31 Cards in this Set
- Front
- Back
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When did microorganisms originate? |
Around 3 billion years ago |
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Where are the majority of microorganisms found? |
Dirt. 97% are found in dirt. |
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What weighs about the same as ALL microorganisms on earth? |
10 times all other life forms combined |
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What nutrients do microbes recycle? |
Carbon, nitrogen, and sulfer |
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Microbes produce what percentage if atmospheric O2? |
Around 50% |
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What are examples of some foods microbes create? |
Cheese, yogurt, buttermilk, bread, sauerkraut, pickles, sausages, alcohol |
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How are microbes beneficial with energy production? |
By anaerobic digesters |
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Microbes in probiotics are: |
With questionable effects and are short teem only |
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Some microorganisms are ______ which are organisms that cause disease |
Pathogens |
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Who invented nomenclature? |
Carl Linneaus |
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The microscope was invented in the 1600s by: |
Robert Hooke and Antoni van Leeuwenhoek |
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Robert Hooke was the first to observe |
Cells. He invented the cell theory |
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Define cell theory |
All living things are composed of cells |
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Antoni van Leeuwenhoek was the first to observe |
Bacteria from scraping of his teeth and peppercorn water |
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Who is the founder of bacteriology |
Ferdinand Cohn |
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Who discovered endospores |
Ferdinand Cohn |
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Define spontaneous generation and who came up with it. |
Aristotles belief that living organisms can originate from nonliving matter. It is the belief that some forms of life (flies and toads) arise spontaneity from mud or rotting meat. Life comes from a VITAL FORCE found in the air. |
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Define Biogenesis |
Idea that life comes only from life |
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What did francesco redi try to prove? |
That meat in an open jar makes maggots while meat in a jar covered with cheesecloth does not make maggots. Theory that only flies make flies, not meat or air. |
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Louis Pasteur disproved _______ _______ in a famous experiment with a _____-____ ______ |
Spontaneous generation ; swan-neck flask |
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Louis Pasteur's famous experiment showed that microorganisms cause |
Spoilage |
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Who developed the aseptic technique |
Louis Pasteur |
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Define germ theory of disease |
Microorganisms can cause disease |
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Who developed a way to grow pure cultures of microorganisms |
Robert Koch |
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All cells contain: |
DNA Cytoplasm Plasma membrane Ribosomes |
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Define Endosymbiotic theory |
Mitochondria and chloroplasts are thought to have evolved from free living bacteria engulfed inside another cell. |
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Viruses are ______ but not _____ meaning that viruses are _______ |
Microorganisms ; cells ; acellular |
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Light microscopy uses visible light including |
Bright field Phase contrast Dark field |
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What are the 6 major cell morphologies |
Coccus Bacillus Spirillium Coccobacillus Spirochete Vibrio |
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What is the conjunction word for the arrangement of the cell being in a chain |
Strepto |
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Why is smaller cell size better |
Large surface to volume ratio Rapid exchange of nutrients and wastes Faster growth rates |
