Question

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

Answer:

1)microscope

2)tree

3)yeast

4)infection of intestine

Answer 2

Answer:

1. microscope
2. Nitrogen
3. Micro-organisms
4. Bacteria

Explanation:

Hope it helps you..