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Random information on the term “Class”:
In biological classification, class (Latin: classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank.[a] Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order.
The class as a distinct rank of biological classification having its own distinctive name (and not just called a top-level genus (genus summum)) was first introduced by the French botanist Joseph Pitton de Tournefort in his classification of plants that appeared in his Eléments de botanique, 1694.
Insofar as a general definition of a class is available, it has historically been conceived as embracing taxa that combine a distinct grade of organization — i.e. a ‘level of complexity’, measured in terms of how differentiated their organ systems are into distinct regions or sub-organs — with a distinct type of construction, which is to say a particular layout of organ systems. This said,the composition of each class is ultimately determined by the subjective judgement of taxonomists. Often there is no exact agreement, with different taxonomists taking different positions. There are no objective rules for describing a class, but for well-known animals there is likely to be consensus.
Random information on the term “SORT”:
According to the Federation of American Scientists, an organization that assesses nuclear weapon stockpiles, as of 2018, the Russian Federation possesses 7,850 total nuclear warheads, of which 1,600 are strategically operational. This is in large part due to the special bomber counting rules allowed by the New START treaty, which counts each strategic nuclear bomber as one warhead irrespective of the number of warheads—gravity bombs and/or cruise missiles carried by the aircraft. The figures are, by necessity, only estimates because “the exact number of nuclear weapons in each country’s possession is a closely held national secret.” In addition to nuclear weapons, Russia declared an arsenal of 39,967 tons of chemical weapons in 1997. The Soviet Union ratified the Geneva Protocol on April 5, 1928 with reservations. The reservations were dropped on January 18, 2001. Russia is also party to the Biological Weapons Convention and the Chemical Weapons Convention. The Soviet Union had a peak stockpile of 45,000 nuclear warheads in 1986. It is estimated that from 1949 to 1991 the Soviet Union produced approximately 55,000 nuclear warheads. In early 2019, more than 90% of the world’s 13,865 nuclear weapons were owned by Russia and the United States.