They are found in most of the habitats on earth like soil, water and inside or outside of large organisms.Archaebacteria are found in very harsh conditions such as in the volcanic vents or at the bottom of the sea.

Kingdom, Phylum, Class, Order, Family, Genus, Species

Archaea, Bacteria, and the Eukarya

Archaebacteria, eubacteria, protista, fungi, plantae and animalia.

The word dichotomous means “two parts.” Each step in the key provides two contrasting choices about a characteristic. Each alternative choice then leads to another pair of clues and then another, until the items are identified. A group of leaves, for example, might first be separated on the basis of vein patterns; each group could then be further subdivided on the basis of other traits such as shape and stem arrangement.