D OMAINS A RCHAE & E UKARYA K INGDOMS A RCHAEBACTERIA & E UBACTERIA Packet #65 Chapter #27.
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Transcript of D OMAINS A RCHAE & E UKARYA K INGDOMS A RCHAEBACTERIA & E UBACTERIA Packet #65 Chapter #27.
KINGDOM ARCHAEBACTERIA “archae” means ancient
Extremely old group These bacteria survive in extreme
environments
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CHARACTERISTICS
Microscopic, autotrophic unicellular prokaryotes
Peptidoglycan absent from cell walls Reproduce asexually
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KINGDOM ARCHAEBACTERIA III
ChemoautotrophsMethanogens
Anaerobes that inhabit sewage, swamps and animal digestive tracts
Live in the deep areas of the ocean where there is no sunlight
Thermophiles Inhabit hot, sometimes acidic environments
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KINGDOM ARACHEBACTERIA Photoautotrophs
Halophiles Live in some of the most extreme conditions
Great Salt Lake (Utah) Dead Sea Salt content is extremely high in these bodies of
water
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KINGDOM EUBACTERIA
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Known as the “disease causing agents”Only a few of
these organisms actually cause diseases
CHARACTERISTICS
Microscopic, unicellular prokaryotes Cell walls generally composed of
peptidoglycan Autotrophs or hetereotrophs Aerobic or anaerobic May have flagella for movement
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ECOLOGICAL ROLE
Most are decomposers Some are parasitic and pathogenic Important in recycling nitrogen and other
elements Used in industrial processes
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EXAMPLES
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Rickettsias Carried by ticks, fleas
or flies Causes Rocky
Mountain Spotted Fever
EXAMPLES
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Cyanobacteria Converts Nitrogen
gas into ammonia, nitrates or nitrites Part of the Nitrogen
Cycle Found in the rice
patties of Asia (where rice is grown) Rice feeds 75% of the
human population Some species
produce toxins dangerous to humans
CLOSTRIDIA Clostridia
Clostridium tetani Causes tetnus
Clostridium perfringens Causes gas gangrene Causes food poisoning
A spore-forming, toxin-producing bacterium that can contaminate meat left at room temperature. The ingested cells release toxin in the digestive tract, resulting in cramps and diarrhea
Clostridium botulinum Causes botulism Used in botox injections
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