(a) heterotrophic bacteria:
helpful in making curd from milk
fixing of nitrogen in legume roots etc.
(b) Archaebacteria:
- Methanogens are present in the guts of several ruminant animals such as cows and buffaloes. They are responsible for the production of methane from ruminating animal dung.
- Archaebacteria a live in harsh habitats salty areas, hot Springs which may give evidence on how life might have evolved on earth.
