Fill in the blanks:

(a) Microorganisms can be seen with the help of a ____________.

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(b) Blue green algae fix __________ directly from air to enhance fertility of soil.

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(c) Alcohol is produced with the help of __________.

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(d) Cholera is caused by __________.

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Maninder Singh's photo - Co-founder, Teachoo

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo