Domain archaea
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Domain Archaea. Kingdom Archaebacteria. Phyla. Crenarchaeota Euryarchaeota Korarchaeota Nanoarchaeota Thaumarchaeota. Archaebacteria. Archea – means ancient Unicellular Prokaryotes No membrane bound organelles No organized nucleus. Cell membrane consists of a phospholipid bilayer

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Domain Archaea

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Domain archaea

Domain Archaea

Kingdom Archaebacteria


Phyla

Phyla

  • Crenarchaeota

  • Euryarchaeota

  • Korarchaeota

  • Nanoarchaeota

  • Thaumarchaeota


Archaebacteria

Archaebacteria

  • Archea – means ancient

  • Unicellular

  • Prokaryotes

    • No membrane bound organelles

    • No organized nucleus


Cell structure

Cell membrane consists of a phospholipid bilayer

The types of lipids are significantly different from all other membranes

Most Archaebacteria have a cell wall that provides protection

Move using flagella

Cell Structure


Cell structure1

Cell Structure

  • Have many different shapes

    • Spherical

    • Rod shaped

    • Spiral

    • Flat

    • Needle like


Metabolism

Metabolism

  • Heterotrophs

    • Lithotrophs – inorganic compounds

    • Organotrophs – organic compounds

  • Autotrophs

    • Phototrophs – use light to make food for energy


Environment

Environment

Archaea are microbes. Most live in extreme environments. These are called extremophiles. Other Archaea species are not extremophiles and live in ordinary temperatures and salinities. Some even live in your guts!


Environment1

Environment

Methanogens – produce methane

Thermophile - love heat

would probably freeze to death at ordinary room temperature.

Halophiles – love salt, called hypersaline environments


Respiration

Respiration

Obligate anaerobe – must NOT have oxygen

Obligate aerobe - must have oxygen

Faculative anaerobe – can have oxygen or not


Reproduction

Reproduction

Asexual reproduction – called binary fission

Conjugation – mixing DNA between two cells


Domain bacteria

Domain Bacteria

Kingdom Eubacteria


Phyla1

Phyla

  • Grouped based on qualities of their shape and membrane structure

  • More than 20 different Phyla


Eubacteria

Eubacteria

  • Eu - means True

  • Unicellular

  • Prokaryotes

    • No membrane bound organelles

    • No organized nucleus


Cell structure2

Cell membrane consists of a phospholipid bilayer

Many Eubacteria have a cell wall that provides protection

Move using flagella

Cell Structure


Cell structure3

Cell Structure

  • Have three different shapes

  • Cocci

    • spherical

  • Bacilli

    • Rod shaped

  • Spirilla

    • Spiral


Cell structure4

Cell Structure

  • Endospore

    • Created by a bacteria when conditions become unfavourable

    • A hard “shell” surrounding the genetic material


Metabolism1

Metabolism

  • Heterotrophs

    • Lithotrophs – inorganic compounds

    • Organotrophs – organic compounds

  • Autotrophs

    • Phototrophs – use light to make food for energy


Environment2

Environment

Bacteria frequently secrete chemicals into their environment in order to modify it favourably

Live in a variety of environments


Respiration1

Respiration

Obligate anaerobe – must NOT have oxygen

Obligate aerobe - must have oxygen

Faculative anaerobe – can have oxygen or not


Reproduction1

Reproduction

Asexual reproduction – called binary fission

Conjugation – mixing DNA between two cells


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