question_answer 29)

  Big holes in Swiss cheese are made by a (a) a machine     (b) a bacterium that produces methane gas (c) a bacterium producing a large amount of carbon dioxide (d) a fungus that releases a lot of gases during its metabolic activities

Answer:

                  (c) The large holes in 'Swiss cheese' are due to production of a large amount of CO2 by abacterium named Propionibacteriumsharmanii. Other options are in correct.