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28 Cards in this Set
- Front
- Back
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Microorganisms
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life forms too small to be seen by unaided eye
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Anthony van Leeuwenhok
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first to view microorganisms about 300 years ago with a 300X microscope
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spontaneous generation
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life arises from nonliving material
debunked by: Francesco Redi Louis Pasteur John Tyndall |
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Fransesco Redi
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demonstrated that worms in meat arise from the eggs of flys
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Louis Pasteur
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"father of microbiology"
demonstrated that microorganisms were present in air contaminated infusions (lidquids with nutrients that support microbial growth) swan neck experiment |
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John Tyndall
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explained contradictory experiments in which microbes grew in "sterile" environments.
not all cells are killed when boiled - some are heat resistant. endospores are present in infusion |
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Schwanns Cell Theory
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all organisms are made up of cells, and a cell is the structural and functional unit of an organ, and ultimately an organism
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archea
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ancient bacteria (extremeophilles)
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bacteria
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prokaryotes, peptidoglycan cell wall
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eukaria
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eukariotic, membrane bound organelles, algiae, fungi, protozoa, muticellular parasites
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Prokaryotic
Size: |
.3-2 um
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Prokaryotic
Nuclear Membrane: |
No
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Prokaryotic
Cell Membrane: |
cell wall with peptidoglycan
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Prokaryotic
Mitochondria: |
no
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Prokaryotic
Chloroplasts: |
no
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Prokaryotic
Cytoskeleton: |
no
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Prokaryotic
Ribosomes: |
70s
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Eukaryotic
Size: |
2-20 um
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Eukaryotic
Nuclear Membrane: |
yes
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Eukaryotic
Cell membrane: |
may not have cell wall
no peptidoglycan |
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Eukaryotic
Mitochondria: |
yes
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Eukaryotic
Chloroplasts: |
yes
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Eukaryotic
Cytoskeleton: |
yes
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Eukaryotic
Ribosomes: |
80s
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Strain
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minor variation within the same species
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Viruses
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obligate intracellular parasites
must have a cell to replicate in small (10-100nm) consist of a protein coat, envelope (maybe), and dsDNA, ssDNA, or ssRNA |
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Viroids
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obligate intracellurar agents, made of RNA only
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Prions
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obligate intracellular agents, made of protein only
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