Published April 25, 2018
The area of increased ozone concentration, the ozonosphere, which falls at a height of 20-55 km, plays a very important role for the Earth. Absorbing almost all of the ultraviolet radiation, ozone thus protects the living organisms from death. Minor doses of ultraviolet radiation, passed by the ozonosphere, kill microorganisms...
Published April 25, 2018
In recent years, AIDS is spreading the pace of the epidemic. In all regions of the world, there is a trend towards an increase in the number of these diseases. The World Health Organization proposed December 1 to be considered World AIDS Day. AIDS was first described by the US Centers for Disease Control and Prevention in 1981, and its causative...
Published April 25, 2018
Cockroaches are sometimes found in deposits of 280-300 million years ago. Bloch, found in amber, with its forty-million-year history - it's just a teenager in comparison with a cockroach. Giant horsetails and tree-like ferns, in dense thickets of which dwelt ancient cockroaches, have disappeared...
Published April 25, 2018
There are at Earth such insects that are so not adapted to life on our planet that seem to be "newcomers" from other worlds. These are termites - creatures that perish from contacting water, can not live in an earthly atmosphere and transfer sunlight. Their only protection from the environment is a termitenik...
Published April 25, 2018
The physiology - the science of the life of organisms. Physiologists are interested in the processes occurring throughout the body and in its individual systems, organs, tissues, cells. How are these processes regulated? How do they change depending on the behavior of the organism in different conditions of its environment?..
Published April 25, 2018
The fauna of virgin Australia, abundant in exotic animals like kangaroos, platypuses, emus, cockatoos, absolutely did not know many species of animals widely distributed on other continents. Accustomed to dairy products, the British colonialists hastened to bring to the fat pastures of their new homeland of cows. And this almost led to disastrous consequences. Just in the meadow grasses of the Australian pastures did not live the natural orderlies - dung beetles...
