Question

Q1 microbes are friend as well as foe. Do you agree? justify by giving examples for each if you agree

Answer 1

yes i agreed microbes are friends as well as foe
 microbes as friend,
                                 helps in the preparation of milk and curd
                                 helps in the preparation of alcohol

microbes as foe,
                         can cause plant disease as well as human disease

Answer 2

$\bf\huge { Answer- }$

Yes, I agree with the statement 'Microbes are friend as well as foe'.

$\bf\huge { Justification- }$

Microbes as friend-

• Microbes help in making curd,bread and making alcohol beverages etc.

Microbes such as lactobacillus promotes the formation of curd from milk . When a little pre-made curd added to the milk, then Lactobacilli bacteria multiplies in milk and converts into curd.

Yeast are helpful for fermentation of dosa batter, bread and idlis.

• Microbes help in making vaccines and antibiotics.

Antibiotics such as Penicillin, Streptomycin are made from microorganisms.

Vaccines are also made from weak microbes .

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Microbes as foe-

• Microbes cause disease in plants.

Citrus canker is caused by bacteria and is spread by air.

Rust of wheat is caused by fungi and spreads through air and seeds.

Yellow vein mosaic of okra(lady finger) caused by virus and spread by insects.

• Microbes cause disease in animals.

Anthrax is fatal disease which is caused by a bacterium called Bacillus Anthracis.

Food and mouth disease is a disease that affects cattle and is caused by virus.

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