Question

Write 10 lines on the usefulness of microorganisms in our lives.

NCERT Class 8th Science Chapter 2 Microorganisms: Friend and Foe

Answer 1

usefulness of microbes r
1. used to produce penicillin
2. help in cleaning environment
3. help in fixing nitrogen to atmosphere
4. produce alcohol,wine, bear
5. manufacture jam,jellies, sauce
6. silica is used in toothpaste is made of algae
7. help in digestion of food
8. used in making bread,cheese, cake
9. used in making soaps

Answer 2

Answer:

Explanation:

Uses of microorganisms:

(i)   Microorganisms help in the preparation of curd, bread, cake etc.          

(ii)   They are used to produce alcohol at large scale.      

   

(iii)   Yeast is used to prepare vinegar.        

   

(iv)   Microorganisms are used to make wines.  

        

(v)   They act as cleaning agent and decompose the waste

products into manure.  

        

(vi)   They destroy the plant and animal dead bodies by decomposing them.          

 

(vii)   They increase soil fertility by fixing nitrogen of atmosphere.            

(viii)   They are used in making medicines like antibiotics and vaccines.          

(ix)   They are used as preservatives for food items.      

    

(x)   They help in various metabolic activities in our body.