ARCHAEA

word archaea is from the ancient greek

archaios meaning "ancient" or "primitive".

features common in eukarya

• gene encoding protein

• replication

• transcription

• translation

features common in bacteria

gene for metabolism

features unique to archaea only

• unique rRNA gene strictire

• methanogenesis

major archaeal phyla

• nanoarchaeota

• euryachaeota

• thaumarchaeaeota

• crenarchaeota

• korarchaeota

is archaea more closely related to eukarya

yes

archaea is best known for

• anaerobic

• hypersaline

• pH extremes

• high temperature

morphology

• cocci and rods

• no sphirochetess or mycelial forms