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Aeropyrum pernix,
Linnaean classification:
Domain-Species
Archaea, Archaebacteria, Crenarchaeota, Thermoprotei,  Desulfurococcales, Desulfurococcaceae
, Aeropyrum Aeropyrum pernix
Fun facts:
Optimally grows in 7ph
has a diameter of one micrometer
Picture:

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Domain: Archaea,
Kingdom: Archaea
Phylum: Euryarchaeota,
Class: Methanobacteria
Order: Methanobacteriales,
Family: Methanobacteriaceae, Genus: Methanobrevibacter
Species: Methanobrevibacter smithii

Fun Facts:

1. Methanobrevibacter smithii is often depicted in a Y - pill shape

2. The Methanobrevibacter smithii is a contributor to energy balance in the human body, specifically the stomach/gut

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Bacteria and Archaea may be similar and we grouped together for a long time before many discovered the difference between the two groups. Bacteria and Archaea are both unicellular. But Archaea lack peptidoglycan in their cell walls which is used to distinguish bacteria from archaea. One of the many other molecular characteristics that make them different from bacteria.

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Archaea are found in extreme locations such as rifts in seas nearing the boiling point of water on earth’s normal atmosphere of 212 F, hot springs, and alkaline/acid waters. They live where there is extreme warmth.
They have also been found in the digestive tracts of cows, termites, and marine animals. While they are in the track, they produce a gas called methane. They also live in undersea marshes but thrive and love living in underground petroleum deposits. If they are not living in an extremely hot environment, they are most likely living on undersea plankton.

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Archaea does not have a cell nucleus but it does have a semi-rigid cell wall to protect it from the harsh environments they inhabit. (yes)

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The purpose pf having archaea is to produce the gas methane (CH₄). They are the primary producer and the cause of methane in cows, termites, and marine animals by living in their digestive tracts. Methane being as very flammable gas is generally used for house water heaters, gas stoves, and some dryers.

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Due to the fact that Archaea live in very hot and harsh environments. Yellowstone's Grand Prismatic Spring is a great example. Each ring of color has a different environment for each bacteria and archaea.

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Varied ways of eating depending on the species (some are  autotrophic and some heterotrophic)

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Reproduce using binary fission meaning they have no true sexual reproduction but some achieve recombination by conjugation

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Cells that don't enclose dna in nuclei so they do not  speratre their genetic material there.

2. size between 1-5 μm or 000001-000005 m
3. more simple than eukaryotes
4. carry out every activity done by living things

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- a group of unicellular prokaryotic organisms that live in extremely warm areas