micro 101 (MJC)
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micro 101 (MJC)
Introduction to Taxonomy: The bacteria
A subgroup of species with one or more characteristics that distinguish it from other subgroups of that species.
Science classification by orderly basis for naming of organisms.
A catagory used in classification, such as species, genus, order, & family.
The system of taxonomy developed by Linneaus with each organism is assigned a genus and specific epithet.
1. 1st. name of genus or genera (pl) is capitalized
2. 2nd. name of specific epithet, NOT CAPITALIZED, two name combined is the species.
example; Escherichia coli or
Define Dichotomous key
Taxonomic key used to identify organisms: composed of paired (either-or) statements describing characteristics.
1. Always start w/question #1.
2. Decide which option best fits your unkown.
3. Proceed to next comparison as directed
Who is Carolus Linnaues
"Father of Taxonomy".
developed binomial (nomenclature).
naming system for all living organizms
Name the five-kingdom system of classification.
Domain, kingdom, phylum, class, order, family, genus, species
"Do kings play chest on fine grain of sand"
Name the 5 kingdom w/major characteristics (1/5)
Prokaryotic & unicellular.
Includes; eubacteria, cyanobacteria, archaeobacteria.
BROKEN UP BY 3 DOMAINS
Name the 5 kingdom w/major characteristics (2/5)
Eukaryotic, mostly unicellular.
Do not have an embryonic stage of development
Name the 5 kingdom w/major characteristics (3/5)
Eukaryotic, mostly multicellular.
Nutrition by absorption of dead organic matter.
Name the 5 kingdom w/major characteristics (4/5)
No microscopic organisms.
Importance to microbiology.
Chemical used in tx of infection.
Plant-microbe interaction (Positive & Negative)
Name the 5 kingdom w/major characteristics (5/5)
No cell wall.
Reproduce by sexual reproduction.
Define the Three Domain System
Define Archeae its main groups
protein walls, no peptidoglycan.
lives in extreme enivornments.
3 main groups are:
Methanogenus; produce methane in absence of O2.
Halophile; live in high salt environments.
Thermophiles; live in Springs, submarine vents
Define Bacteria from the three domain system
1. morphology; staining characteristics & growth.
2. bio chemical test for ID of bacteria.
3. DNA comparisms
Define Eukarya from the three domain system
plants, animals,& people
Explain the tree of life vs. the shrub of life.
"strub of life" diagram better represents our current understanding of the early evolution of life.There are many roots, rather than a single ancestral line.
"Tree of life" is plain wrong for the being of increasing numbers giving rise to a linear, and is eeen as oversimplified.
How do we classify bacteria?
Morphology, staining, characteristics, and growth characteristics.
How do we use genetic homology?
Methods of ID genetic homology
: DNA/RNA sequencing and DNA hybridization.
Define phage typing
Use of bacteriophages to determine similarities/differences among different bacteria.
Who was David Bergey and what was his major contribution to the field of microbiology?
He developed a manuel that classified all bacteria by staining rxn & biochemical.
reference source for bacterial taxonomy
How are viruses classified?
viruses do not belong to any kingdom.
Type & arrangement of nucleic acid material.
Symmetry of their protein coat.
Presence of absence of out membrane