Why are bacteria useful to humans? Detailed answer

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Why are bacteria useful to humans? Detailed answer

Big encyclopedia for children and adults

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Than bacteria are useful to the person?

When talking about bacteria, many people immediately think of harmful organisms that spread diseases. But the fact is that there are more than two thousand different types of bacteria and most of them are useful to living organisms, including humans.

Bacteria cause decay of dead plants and animals on land and in water. Without these bacteria, the earth would be covered with various dead material. Processing complex substances, bacteria decompose them into simple ones. These substances are returned to the soil, water and air, where they can be used by plants and animals.

Bacteria play an important role in the digestive process of humans and other animals. There are a lot of them in the intestines. These bacteria break down food. At the same time, they produce vitamins that the body then uses. Bacteria are essential to sustain life. For example, nitrogen-containing bacteria live in the soil and help turn nitrogen into substances that plants need. Humans eat these plants.

Bacteria are essential in the fermentation process in the production of cheese and vinegar. The same process occurs in the industrial production of paints, plastics, cosmetics and confectionery. Bacteria are needed to make some drinks.

Bacteria are used in manufacturing processes for harvesting tobacco leaves, making leathers, peeling coffee and cocoa beans, and separating certain fibers in the textile industry. Therefore, we can conclude how important bacteria are in human life. There are many other areas of activity where bacteria are used and will be used in the future.

Author: Likum A.

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Exam - no hours 12.09.2019

The UK is considering a ban on wearing watches for school exams. This measure should stop attempts of fraud. An independent commission tasked with investigating exam abuse has concluded that it is too difficult to distinguish between regular and smart watches, and it is impractical to check every student's watch. A complete ban would be more appropriate in these circumstances.

Noting a "very low level of abuse," the Independent Abuse Review Board is confident that "a total ban on all types of watches, as well as other Internet devices, eliminates any possibility for test-takers to gain unauthorized access to the Internet during exams."

Some schools in the US have already introduced a similar ban. As for the UK, so far this is only a recommendation to the relevant department (Office of Qualifications and Examinations Regulation or Ofqual), which oversees all schools in this country. Ofqual has taken note of the recommendation and plans to consider banning hours from exams as early as next summer.

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