Match the names of scientists given in Column A with the discovery made by them given in Column B. Column A Column B a) Louis Pasteur i. Penicillin b) Robert Koch ii. Anthrax bacterium c) Edward Jenner iii. Fermentation d) Alexander Fleming iv. Smallpox vaccine v. Typhoid

The correct matching for the given question is as follows- (a) Louis Pasteur- (iii) Fermentation Louis Pasteur discovered fermentation in 1857 when he demonstrated how the milk sours to form a curd. He proved that yeast is responsible for the formation of alcohol from sugar. (b) Robert Koch- (ii) anthrax bacterium Robert Koch s tudied Bacillus anthracis , this bacterium causes a disease known as anthrax in cattle. Bacteria can be naturally found in soil and affect domestic and wild animals. Infected animals suffer from fever and are not able to breathe properly. (c) Edward Jenner- (iv) smallpox vaccine The first discovered vaccine was against smallpox by Edward Jenner. He is called as Father of vaccination. The causing organism of smallpox is a virus. (d) Alexander Fleming- (i) Penicillin Alexander Fleming discovered the first antibiotic called Penicillin from the fungus Penicillium notatum .

E M B I B E

NCERT Exemplar Science - Class 8>Chapter 2 - Microorganisms Friend and Foe>VERY SHORT ANSWER QUESTIONS>Q 9

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8th CBSE

IMPORTANT

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Suggest a suitable word for the following statement.

Chemicals added to food to prevent the growth of microorganisms. (Antibiotics/preservatives/fermentation)

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Important Questions on Microorganisms Friend and Foe

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8th CBSE

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NCERT Exemplar Science - Class 8>Chapter 2 - Microorganisms Friend and Foe>VERY SHORT ANSWER QUESTIONS>Q 9

Suggest a suitable word for the following statement.

Nitrogen-fixing microorganism present in the root nodules of legumes. (Streptococcus/ Rhizobium)

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8th CBSE

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NCERT Exemplar Science - Class 8>Chapter 2 - Microorganisms Friend and Foe>VERY SHORT ANSWER QUESTIONS>Q 9

An agent that spreads pathogens from one place to another is called vector or virus?

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NCERT Exemplar Science - Class 8>Chapter 2 - Microorganisms Friend and Foe>VERY SHORT ANSWER QUESTIONS>Q 9

Suggest a suitable word for the following statement.

Chemicals which kill or stop the growth of pathogens.

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8th CBSE

IMPORTANT

NCERT Exemplar Science - Class 8>Chapter 2 - Microorganisms Friend and Foe>VERY SHORT ANSWER QUESTIONS>Q 10

Match the names of scientists given in Column A with the discovery made by them given in Column B.

Column A	Column B
a) Louis Pasteur	i. Penicillin
b) Robert Koch	ii. Anthrax bacterium
c) Edward Jenner	iii. Fermentation
d) Alexander Fleming	iv. Smallpox vaccine
	v. Typhoid