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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Pandemics (mass epidemics)
Pandemic is an epidemic that is massive in nature. That is, an epidemic that can spread across territories of many can hit entire continents.countries that The most famous pandemics -…

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Karas and its features
Karas is a fairly common species of fish belonging to the family of carp. Interestingly, in this species there are several species of crucian carp, one of which is the…

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useful plants

Ayr and his benefit

Air is a genus of evergreen herbaceous plants, which includes from 2 to 6 species (according to different sources). There are these useful plants in various humid places: on the banks of rivers and lakes, in swamps. Moreover, most of them are located directly in the water, in shallow waters

Air
Description of Aira

The height of the plant varies from 10 to 120 cm. At the same time, Aire has a thick rhizome, a straight three-edged stem and long leaves emerging from the rhizome. The color of the plant is dull green. Continue reading

The importance of swamps in nature
The swamp is a part of the earth's surface, which has excess moisture, high acidity and low soil fertility, which is the consequence of raising the ground water to the…

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Plain roach
Roach is a very common fish belonging to the family of carp. Other names of this species - vobla, ram, chebak, squire, fence. And it has such a large variety…

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