Class 12 Biology Ecology Kingdom - Monera And Viruses
Organisms called Methanogens are most abundant in a
(a)
cattle yard
(b)
polluted stream
(c)
hot spring
(d)
sulphur rock
Correct answer: (a) 
Solution: Methanogens are present in the gut of several ruminants animals such as cows and nuffaloes and they are responsible for the production of methane (biogas) from the dung of these animals. Thus, they are most abundant in a cattle yard.

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ecosystem
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