Types of microorganisms and their significance
Microorganisms are a group of so small living organisms that they are not visible by human vision. Their size is less than 1 millimeter, and, sometimes, much less. Although there…

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World ocean and its properties
The ocean covers about 70% of the surface of our planet. Thus, it is an aquatic membrane, stretched almost all over the surface of the Earth. The oceans are continuous,…

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Salvia officinalis
Medicinal sage is a grassy plant of the genus Salih. Its name, as you can guess, received this form for the medicinal properties that it possesses. Medicinal sage does not…

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Tiger is the world's largest cat
Tigers are a kind of mammals that belong to the cat family. They represent fairly large, fast and strong animals, making them dangerous predators. This is evidenced even by their…

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Flies and their role in nature
Flies are very common flying two-winged insects. They inhabit practically all warm areas of the planet, delivering many problems to living organisms, including people. After all, flies are the carriers…

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