NEET BIOLOGY

Detailed explanation-1: -Methanogens are abundant in cattle yards as they are found in the bovine rumen. They release methane and are basically archaebacteria.

Detailed explanation-2: -Methanogens are anaerobic archaea that grow by producing methane gas.

Detailed explanation-3: -Methanogens are archaea bacteria that produce methane as a metabolic by-product. Examples of methane-producing genera are Methanobacterium, Methanosarcina, Methanococcus, and Methanospirillum. Methanogenic bacteria are widespread in nature and are found in mud, sewage, and sludge and in the rumen of animals.

Detailed explanation-4: -Methanogens are common in wetlands, where they are responsible for marsh gas, and in the digestive tracts of animals such as ruminants and many humans, where they are responsible for the methane content of belching in ruminants and flatulence in humans.

Detailed explanation-5: -The acetoclastic genus Methanosaeta was the most abundant methanogenic genus in one of the three full-scale AD bioreactors (accounting for 33.7–67.9% of total methanogens), while. Hydrogenotrophic methanogen Methanobacterium accounted for 34–79% of the total methanogen abundance of the third digester.