Brighton lines on the usefulness of microorganism in our life..
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Answers
Answer:
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Explanation:
Microorganisms are very useful to us.
(vii) Microorganisms are used to prepare vaccines for various diseases. (viii) They are useful for agriculture sector, as they enhance the fertility of soil by fixing nitrogen. (ix) They work as natural cleaners, as they decompose the dead bodies of plants and animals.
Answer:
They are helpful in cleaning up of the environment. For example, the organic wastes
(vegetable peels, remains of animals, etc.) are broken down into harmless and usable
substances by bacteria.
Curd contains several microorganisms. Of these, the bacterium, Lactobacillus promotes
the formation of curd. It multiplies in milk and converts it into curd.
Bacteria are also involved in the making of cheese, pickles and many other food items.
Bacteria and yeast are also helpful for fermentation of rice idlis and dosa batter.
Yeast reproduces rapidly and produces carbon dioxide during respiration. Bubbles of the
gas fill the dough and increase its volume. This is the basis of the use of yeast in the baking
industry for making breads, pastries and cakes.
Microorganisms are used for the large-scale production of alcohol, wine and acetic acid
(vinegar).
Antibiotics are being produced from bacteria and fungi.
Microorganisms are helpful in producing vaccines against disease causing agents.
Some bacteria are able to fix nitrogen from the atmosphere to enrich soil with nitrogen
and increase its fertility.
Microorganisms decompose dead organic waste of plants and animals to convert them
into simple substances. These substances are again used by other plants and animals.
Thus, microorganisms can be used to degrade the harmful and smelly substances and
thereby clean up the environment.