Question

mention two useful and two harmful effect of bacteria​

Answer 1

Bacteria are one type of microorganisms invisible to the naked eye but can be seen under a microscope. Uses of Bacteria * Bacteria like lactobacilli are used in the preparation of curd. *Bacteria are also used to prepare pickles, cheese and other products *Lactobacillus in addition to Yeast are used in industrial production of wine. *Bacteria act as decomposers to clean up organic waste by decomposing them into usable substances. *Bacteria are useful in laboratories to test the effects of medicines. Harmful effects of bacteria *Harmful bacteria can spoil our food, leather, clothing etc. *Harmful bacteria causing diseases are called as pathogens. Bacteria can cause disease in humans, animals and plants.

Answer 2

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Harmful effects :

• Most can cause food spoilage.
• Can cause foul smelling gas.

Useful effects :

• Sources of enzymes.
• Help in digestion .

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