Question

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 1

Explanation:

1. microscope
2. nitrogen
3. microorganisms
4. bacteria

Mark me as BRAINLIST

Answer 2

1. microscope

2. nitrogen

3. microorganisms

4. bacteria