10
This presentation is the property of its rightful owner.
Sponsored Links
1 / 17

Classification of Microorganisms PowerPoint PPT Presentation


  • 54 Views
  • Uploaded on
  • Presentation posted in: General

10. Classification of Microorganisms. 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.

Download Presentation

Classification of Microorganisms

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Classification of microorganisms

10

Classification of Microorganisms


Classification of microorganisms

Taxonomy

  • Taxonomy

    • The science of classifying organisms

    • Provides universal names for organisms

    • Provides a reference for identifying organisms


Classification of microorganisms

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

      • Possibly as many as 10 to 100 million with fewer than 10% discovered (1.7 million)


Taxonomy

Taxonomy

  • 1735Plant and AnimalKingdoms

  • 1857Bacteria and fungi put in the Plant Kingdom

  • 1866Kingdom Protista proposed for bacteria, protozoa,

    algae, and fungi

  • 1937Prokaryote introduced for cells "without a nucleus"

  • 1959Kingdom Fungi

  • 1961Prokaryote defined as cells in which nucleoplasm is

    not surrounded by a nuclear membrane

  • 1968Kingdom Monera proposed

  • 1978Two types of prokaryotic cells found


The three domain system

The Three-Domain System

Table 10.1


The three domain system1

The Three-Domain System

Figure 10.1


Classification of microorganisms

Table 10.2


Endosymbiotic theory

Endosymbiotic Theory

Cyanophora paradoxa

Figures 10.2, 10.3


Scientific names

Scientific Names


Classification of microorganisms

Table 10.3


Taxonomic hierarchy

Taxonomic Hierarchy

Figure 10.5


Species definition

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


Domain eukarya

Domain Eukarya

  • Animalia: Multicellular; no cell walls; chemoheterotrophic

  • Plantae: Multicellular; cellulose cell walls; usually photoautotrophic

  • Fungi: Chemoheterotrophic; unicellular or multicellular; cell walls of chitin; develop from spores or hyphal fragments

  • Protista: A catchall for eukaryotic organisms that do not fit other kingdoms


Identification methods

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


Classification of microorganisms

“Enterotube II”

Figure 10.9 - Overview (1 of 3)


Classification of microorganisms

Enterotube II


Classification of microorganisms

Figure 10.7


  • Login