Which of the followings is mainly produced by the activity of anaerobic bacteria on sewage?
Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by
Answer: Using them for producing biogas.
Which one of the following is used as biological insecticide?
Azolla is used as a biofertilizer because it
Answer: Has association of nitrogen fixing Cyanobacteria
A nitrogen fixing microbe associated with Azolla in rice fields is
Physical removal of large and small from the sewage through filtration and sedimentation is called:
Answer: Primary treatment
The yeast that is used in alcohol production and bread making is
Answer: Saccharomyces cerevisiae
In paddy fields biological nitrogen fixation is chiefly brought by
Which of the following bacterium produces butyric acid?
Answer: Clostridium butylicum
Green manure plants used by farmer mainly belong to
The common nitrogen-fixer in paddy fields is
Human insulin is being commercially produced from a transgenic species of
Morphine, which is used as an analgesic is obtained from
Answer: Papaver somniferum
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
Yeast is used in the production of