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