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 __________.

Answers (1)
M manish

(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.

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