Domain Archaea

Domain that is Greek - ancient ones

2 Representative Phyla

Phylum that has a Greek word meaning fountain and ancient

In Phylum Crenarchaeota, it Includes the extreme ___, or ___ prokaryotes

With __ (and other sterols) associated with the cell membrane.

most thermophilic of all known prokaryotes

A. Structure of Phylum Crenarchaeota

Cell Form: ,___ , ___, ___.

Cell Wall: ___; gram stain: ___.

Motility: ___.

B. Physiology of Phylum Crenarchaeota

O2 TOLERANCE: Most are strict ___; 2 are

____.

Substrates:

Facultative chemoautotrophs (lithotrophs) use elemental

___ as an energy source.

Others are heterotrophic and oxidize organic compounds in the presence of oxygen or sulfur (_____ - _____).

Some can ferment _____ compounds (to CO2 and fatty

acids).

Products of Crenarchaeota:

lithotrophic organisms produce___,

___, and ____.

heterotrophic species produce__ , __, and__.

Ecology of Crenarchaeota

They grow in hot, ___-rich environments, called ___.

Such environments include hot sulfur springs which are mildly to very acidic; __-__oC.

They also include ___ volcanic vents.