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The Three Domains

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The Three Domains All organisms belong to one of three domains, depending on their characteristics. A domain is the most inclusive (broadest) taxonomic category. – PowerPoint PPT presentation

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Title: The Three Domains


1
The Three Domains
  • All organisms belong to one of three domains,
    depending on their characteristics. A domain is
    the most inclusive (broadest) taxonomic category.
    A single domain can contain one or more kingdoms.
  • Archaea
  • Eubacteria
  • Eukaryota (Eukarya)

2
The Three Domains
  • Archeae very primitive forms of bacteria
  • Eubacteria more advanced forms of bacteria
  • Eukaryota all life forms with eukaryotic cells

3
The Three Domains of Life
  • Organisms are placed into domains and kingdoms
    based on their cell type, their ability to make
    food, and the number of cells in their bodies.

Ability to make food
Heterotrophic or Autotrophic
Cell Type
Number of cells in their body
Prokaryotic or Eukaryotic
Unicellular or Multicellular
4
The Three Domains of Life
  • Organisms can be
  • Prokaryotic cells that lack a nucleus
  • Eukaryotic cells that contain a nucleus
  • Unicellular single-celled made up of one cell
  • Multicellular made up of many cells
  • Autotrophic can make their own food
  • Heterotrophic can not make their own food

5
The Six Kingdoms of Life
  • Domain Archaea
  • Kingdom Archaebacteria
  • known as ancient bacteria they are the most
    primitive type of organisms
  • they thrive in the most extreme environments on
    Earth they are often referred to as
    extremophiles
  • found in hot springs, very salty water, swamps,
    and the intestines of cows

6
Domain Archaea
7
The Six Kingdoms of Life
  • Domain Archaea
  • Kingdom Archaebacteria
  • they are unicellular, prokaryotic
  • and some are autotrophic and
  • others heterotrophic
  • They are different from
  • bacteria in the structure and
  • chemical makeup of their cells.

8
The Three Domains of Life
  • Domain Eubacteria
  • Kingdom Eubacteria
  • They are found everywhere on Earth except extreme
    environments.
  • They are unicellular, prokaryotic, some are
    autotrophic and others are heterotrophic.

9
The Six Kingdoms of Life
  • Domain Eukarya (Eukaryota)
  • Kingdoms
  • Protista (Protists)
  • Fungi
  • Plants (Plantae)
  • Animals (Animalia)

10
The Six Kingdoms of Life
  • Kingdom Protista (Protists)
  • the odds and ends kingdom
  • includes any organism that can not be classified
    as a animal, plant, or fungus
  • eukaryotic
  • some are unicellular, others are multicellular
  • some are autotrophs, others are heterotrophs

11
The Six Kingdoms of Life
  • Protists

amoeba
euglena
volvox
paramecium
12
The Six Kingdoms of Life
  • Fungi
  • eukaryotic
  • most are multicellular
  • heterotrophic
  • include yeast (unicellular), molds, mildews, and
    mushrooms

13
The Six Kingdoms of Life
  • Plants
  • multicellular
  • eukaryotic
  • autotrophic
  • most live on land

14
The Six Kingdoms of Life
  • Animals
  • multicellar
  • eukaryotic
  • heterotrophic
  • live in diverse environments
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