A microorganism is found in the rumen of cattle and contributes to the production of biogas from dung. How should it be
Methanogens are archaebacteria found in marshy habitats and in the gut of ruminants. They produce methane and are responsible for biogas formation from cattle dung.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Kingdom Monera - Archaebacteria and Eubacteria