Biologists from the Moscow state University have studied how the reduction of insects in the course of evolution affects the size of their internal and external organs. It turned out that this retains the proportions of the latter, although the nervous system increases. About it reported in a press release received by "the Ribbon.ru" on Wednesday, may 17.
The scientists focused their attention on the process of miniaturization — the reduction of the body of arthropods to the lowest possible size. This is one of the main directions of the evolution of insects, in which they become comparable with microscopic organisms. However, previously it was not clear what adjustment while undergoing their internal organs.
Biologists have constructed a 30 complete and 26 partial three-dimensional computer reconstructions of the body 22 species of insects from 11 families belonging to five orders (Seinajoki, senedy, thrips, Coleoptera and Hymenoptera). The volumes of the bodies of the small and large arthropods differed by more than 150 thousand times.
Experts have shown that the majority of organ systems in insects are able to scale and maintain the aspect ratio with repeated changes of body size. "Organ systems maintain organization, and some even the same relative amount, despite repeated size reduction", — said Alexey Polilov, one of the authors of the study.
It was found that the sexual and the nervous system in the reduction of body size increase in several times. According to scientists, they limit the minimum size.
Australian and canadian geologists have studied the dynamics of tectonic plates of the Earth in the period from 1000 to 520 million years ago. Based on the authors maps of the planet's surface edition of The Conversation produced a short video showing the evolution of a planet within a specified period.
Honor, a sub-brand of Huawei Corporation, was held the official presentation of the new flagship, which told in detail about the smartphone Honor 9. The smartphone has a 5.15 inch display with Full HD resolution. It is equipped with CPU Kirin 960 and four or six gigabytes of RAM.
An international group of scientists from Germany, Sweden and Austria found that water at room temperature consists of two fluids of different density and viscosity. When rapidly cooled, they go into two forms of amorphous ice. This is the conclusion of physics came, using the method of x-ray spectroscopy.
The President of Ukraine Petro Poroshenko said that the problem of corruption in Ukraine "comes from the Soviet system of corruption so deeply rooted in society and in the minds of everyone." However, he noted that even in such circumstances, the Ukrainian government managed to achieve "brilliant results" in the fight against corruption.
People's artist of the USSR Vladimir Etush was transferred from intensive care to a regular room, but as long as he remains in the hospital. "Vladimir Abramovich today was transferred from intensive care to a regular ward. But, as the doctors said, a few days it needs to ponablyudat", — said the representative of the press service of the Vakhtangov theatre.
The Merlin was first used built for them on the Yamal artificial nests for breeding, told in the regional Department for science and innovation. A special wooden platform for these predatory Arctic set for population growth, as the Gyrfalcons themselves don't build nests, preferring strangers.