Millenium, or Cutting grass
Thistle ordinary, or Cutting grass - is a perennial grassy plant with many beneficial properties. It got its names due to the separation of leaves into a large number of…

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Viruses and viral diseases
The virus is an infectious agent that does not have a cellular structure, and is capable of reproducing only within cells of living organisms. For this they are referred to…

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The significance of ecology in our world
Ecology is called science studying the interaction of living organisms among themselves, as well as with the surrounding world. This is necessary in order to minimize the harm done by…

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signs of both

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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Pollution of reservoirs
Water pollution is a serious environmental problem. Indeed, water is essential for the existence of all living organisms, including humans. But its contamination makes it impossible to use water for…

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