File Name: harmful and useful bacteria .zip
Bacteria are microscopic, single-celled organisms that thrive in diverse environments. These organisms can live in soil, the ocean and inside the human gut.
Microorganisms occupy every small niche of the ecosystem and influence us in many ways. Their influence on human life is generally beneficial but at times can also be detrimental. The diversified role of microbes begins at their natural habitats. Elements as carbon, nitrogen, oxygen, sulphur, and phosphorus are basic requirement for life forms to survive. They are found in abundance in nature, though not necessarily in forms that organisms can use.
What Are Bacteria?
Bacteria are microorganisms and they are useful to us. Bacteria are economically important as these microorganisms are used by humans for many purposes. The beneficial uses of bacteria include the production of traditional foods such as yogurt, cheese, and vinegar. Microbes are also important in agriculture for the compost and fertilizer production. Bacteria are used in genetic engineering and genetic changes.
Anaerobic sugar fermentation reactions by various bacteria produce different end products. The production of ethanol by yeasts has been exploited by the brewing industry for thousands of years and is used for fuel production. Specific bacteria carry out the oxidation of alcohol to acetic acid in the production of vinegar. Other fermentation processes make even more valuable products. Organic compounds , such as acetone , isopropanol, and butyric acid , are produced in fermentation by various Clostridium species and can been prepared on an industrial scale.
Microbes and Environment
Some of these bacteria can be harmful to human health. Drinking water with disease-causing bacteria, viruses, or parasites collectively called pathogens can make you sick. It is not practical to test drinking water for every type of pathogen, but it is simple to test drinking water for coliform bacteria. The presence of coliform bacteria can indicate there may be harmful pathogens in the water. The presence of coliform bacteria, specifically E. Infants, children, elderly people, and people with weakened immune systems are more likely to get sick or even die from pathogens in drinking water.
In this article we will discuss about the harmful and useful activities of bacteria. Some important bacterial diseases of plants and animals, including human beings is given below Table 2. They break down the nitrates in a stepwise manner either to ammonia through assimilatory nitrate reduction or to N 2 through dissimilatory nitrate reduction. In favourable temperature and humidity, bacteria can grow luxuriantly in many food materials. They change the flavour, appearance and smell of food.
Students will understand that microorganisms range from simple to complex, are found almost everywhere, and are both helpful and harmful. STUDENT.
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Microbes are omnipresent in the biosphere, and their presence invariably affects the environment in which they grow. The effects of microbes on their environment can be beneficial or harmful or inapparent with regard to human measure or observation. The most significant effect of the microbes on earth is their ability to recycle the primary elements that make up all living systems, especially carbon, oxygen, and nitrogen N. Primary production involves photosynthetic organisms which take up CO 2 from the atmosphere and convert it to organic cellular material.
Жертва ощутила прикосновение смерти, и началась совершенно иная игра. Беккер мчался, не видя ничего вокруг, постоянно сворачивал, избегая прямых участков.
Беккер миновал указатель Центр Севильи - 2 км. Если бы ему удалось затеряться в центральной части города, у него был бы шанс спастись. Спидометр показывал 60 миль в час.
- И откуда мы знаем, что именно ищем. Одно различие от природы, другое - рукотворное. Плутоний впервые был открыт… - Число, - напомнил Джабба. - Нам нужно число.