Question

Give the main points in the archaebacteria biological classification of 1

Answer 1

Answer:

Archaebacteria encompass several distinct subgroups including methanogens, extreme halophiles, and various thermoacidophiles. The common characteristics of Archaebacteria known to date are these:

(1) the presence of characteristic tRNAs and ribosomal RNAs;

(2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat;

(3) the occurrence of ether linked lipids built from phytanyl chains and

(4) in all cases known so far, their occurrence only in unusual habitats. These organisms contain a number of 'eucaryotic features' in addition to their many bacterial attributes.

This is interpreted as a strong indication that the Archaebacteria, while not actually eucaryotic, do indeed represents a third separate, line of descent as originally proposed.