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1. Archaebacteria differ from other bacteria in having a different cell wall structure 2. Methanogens live in marshy areas and halophiles live in hot springs. 3. Methanogens are present in the gut of several ruminant animals

( a ) 1 is correct but 2 and 3 are incorrect
( b ) 1 and 3 are correct but 2 is incorrect
( c ) 2 is correct but 1 and 3 are incorrect
( d ) 1 and 2 are correct but 3 is incorrect
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(B) is the right answer.

Archaebacteria are special since they live in some of the most harsh habitats such as extreme salty areas (halophiles), hot springs (thermoacidophiles) and marshy areas (methanogens). Archaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their survival in extreme conditions. 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.
answered Mar 20, 2014 by pady_1
 

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