Classification of microorganisms
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Classification of Microorganisms. Putting Bugs in Boxes. Taxonomy. Taxonomy The science of classifying organisms Provides universal names for organisms Provides a reference for identifying organisms. Taxonomy. Systematics or phylogeny The study of the evolutionary history of organisms

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Classification of Microorganisms

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Classification of Microorganisms

Putting Bugs in Boxes


Taxonomy

  • Taxonomy

    • The science of classifying organisms

    • Provides universal names for organisms

    • Provides a reference for identifying organisms


Taxonomy

  • Systematics or phylogeny

    • The study of the evolutionary history of organisms

  • All Species Inventory (2001-2025)

    • To identify all species of life on Earth


The Three-Domain System

Table 10.1


The Three-Domain System

Figure 10.1


Endosymbiont Theory

Figure 10.2

Figure 10.3


Scientific Names


Taxonomic Hierarchy

Figure 10.5


Species Definition

  • Eukaryotic species:

    • A group of closely related organisms that breed among themselves

  • Prokaryotic species:

    • A population of cells with similar characteristics

    • Clone: Population of cells derived from a single cell

    • Strain: Genetically different cells within a clone

  • Viral species:

    • Population of viruses with similar characteristics that occupies a particular ecological niche


References


Identification Methods

  • Morphological characteristics: Useful for identifying eukaryotes

  • Differential staining: Gram staining, acid-fast staining

  • Biochemical tests: Determines presence of bacterial enzymes

Figure 10.8


Microbiology Lab Order

Figure 10.7


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