Question

3. Write short notes
A. Useful and harmful bacteria​

Answer 1

Answer:

Use full of bacteria is lacto bacillus

bacteria it helps us to form curd.

Harmful bacteria is causes type of

disease which is cholera, etc

Answer 2

Usefulness

• Rhizobium bacteria is used to fix the atmospheric nitrogen to the soil in a usable form.

It is also used in making of medicines

Harmfulness

• Damage the clothing
• Spoil the food
• Also causes diseases in humans as well as in animals.