Which of the following is not produced with the help of microorganisms?
Fill in the blanks:
(a) Microorganisms can be seen with the help of a _________.
(b) Blue green algae fix _________ directly from air to enhancefertility of soil.
(c) Alcohol is produced with the help of _________.
(d) Cholera is caused by _________.
Which of the following food items are not formed by the help of microorganisms?
In which of the following fields is microorganisms not used?