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Q. Fill up the blanks by selecting the correct option
(i) Biogas is a mixture of gases which predominantly contains________ and is used a s ________
(ii) Methanogens are commonly found in the_______during sewage treatment
(iii) _______ species are free-living fungi and effective biocontrol agents of several plant pathogens

Microbes in Human Welfare

Solution:

Correct answer is (a) (i) methane, fuel, (ii) anaerobic sludge, (iii) Trichoderma