Normal cell division is also the basis for asexual reproduction. Only one type of cell is involved, with no input from another individual. Because no new genetic material is introduced, there is no variation in the resulting offspring.
The Polka is a Central European dance and genre of dance music familiar throughout Europe and the Americas.It originated in the middle of the 19th century in Bohemia, now part of the Czech Republic.he polka also migrated to the Nordic countries where it is known by a variety of names in Denmark (galopp, hopsa), Estonia (polka), Finland (pariisipolkka, polkka), Iceland, Norway (galopp, hamborgar, hopsa/hopsar, parisarpolka, polka, polkett, skotsk) and Sweden (polka).
After the invention of the accordion in 1829, its popularity spread throughout the world, in no small measure due to the polka craze. Once the polka became a craze in Paris and London during the spring of 1844, it diffused rapidly to the rest of the world.he accordion was heard frequently in popular music beginning around 1910 until about 1960. With rise of the popularity of the guitar (in particular the electric guitar) and rock music, the popularity of the accordion in pop music in Europe and North-America declined strongly.