Question

NCERT VIII - SciencesWrite 10 lines on the usefulness of microorganisms in our lives.

Answer 1

They are very useful in our day to day life. Lactobacilus is used for making of curd.Yeast is used for making bread, fermentation,etc. Some bacteria living inside our body help in digestion. Penicillin is an important antibiotic.Decomposes like fungi, help soil in enriching it in fertility.    

Answer 2

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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.

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