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Q.1 Fill in the blanks.
(a) Microorganisms can be seen with the help of a ____________.
(b) Blue green algae fix __________ directly from air and enhance fertility of soil.
(c) Alcohol is produced with the help of __________.
(d) Cholera is caused by __________
Answer :

(a) Microorganisms can be seen with the help of a __microscope__.
(b) Blue green algae fix __nitrogen__directly from air and enhance fertility of soil.
(c) Alcohol is produced with the help of __yeast__.
(d) Cholera is caused by ___Bacteria- Vibrio cholera__.