Write a short note on Archaebacteria.

(N/A) $\rightarrow$ Archaebacteria are special because they live in some of the most harsh habitats,such as extreme salty areas (halophiles),hot springs (thermoacidophiles),and marshy areas (methanogens).
$\rightarrow$ Archaebacteria differ from other bacteria due to their unique cell wall structure. This feature is responsible for their survival in extreme environmental conditions.
$\rightarrow$ Methanogens are present in the gut of several ruminant animals,such as cows and buffaloes,and they are responsible for the production of methane (biogas) from the dung of these animals.