Tuesday, March 17, 2020

Difference between communism and socialism essays

Difference between communism and socialism essays The history of Communism started with one man Vladimir Ilich Lenin. Communism is a system of government in which resources and production facilities are the property of the entire society rather than individuals. In a communist society, Labor is shared equally and the benefits of labor are distributed according to need. Under such a System, All people would be equal, without class. Although the basic idea of communism has existed since the time of Plato, modern communism is identified with the system of government described by Karl Marx and Fredrick Engels in the "Communist Manifest". They believe that capitalistic systems, in which the rich upper class prospered through the exploitation of the powerless lower class, were bound to destroy themselves. At this point, the poor would rebel against their former oppressors and form classless society. Russian Revolution of 1917, series of events in imperial Russia that culminated in 1917 with the establishment of the Soviet state that becam e known as the Union of Soviet Socialist Republics (USSR). The two successful revolutions of 1917 are referred to collectively as the Russian Revolution. The first revolution overthrew the autocratic imperial monarchy. It began with a revolt on February 23 to 27, 1917, The second revolution, which opened with the armed insurrection of October 24 and 25, organized by the Bolshevik Party against the Provisional Government, effected a change in all economic, political, and social relationships in Russian society; it is often designated the Bolshevik, or October, Revolution. The causes of the Russian Revolution are rooted deep in Russia's history. For centuries, autocratic and repressive czarist regimes ruled the country and most of the population lived under severe economic and social conditions. During the 19th century and early 20th century various movements aimed at overthrowing the oppressive government were staged at different times by students, w...

Sunday, March 1, 2020

Habits and Traits of Stoneflies, Order Plecoptera

Habits and Traits of Stoneflies, Order Plecoptera Aquatic stonefly nymphs live only in cool, clean streams, and are an important bioindicator of good water quality. Stoneflies belong to the order Plecoptera, which comes from the Greek for twisted wings. Description Adult stoneflies are fairly drab insects, with flattened, soft bodies. They hold their wings flat over the bodies when at rest. Stonefly adults have long, threadlike antennae, and a pair of cerci extends from the abdomen. Stoneflies have two compound eyes and three simple eyes and chewing mouthparts, though not all species feed as adults. Stoneflies fly poorly, so they dont stray far from the stream where they lived as nymphs. Adults are short-lived. Stoneflies exhibit unusual courtship behavior. The males drum their abdomens on a substrate to send an acoustic signal to potential female mates. A receptive female drums her response. The pair will continue to drum to each other, gradually moving closer and closer until they meet, and mate. After mating, females deposit their eggs in the water. Stonefly nymphs develop slowly, taking 1 to 3 years to molt repeatedly before emerging as adults. Stoneflies are so named because the nymphs often live under stones in streams or rivers. They feed on a variety of plant and animal matter, both dead and living, depending on the species and age of the nymph. Habitat and Distribution As nymphs, stoneflies inhabit cold, fast-flowing streams in pristine condition. Adult stoneflies are terrestrial but tend to stay close to the streams from which they emerge. Worldwide, entomologists identify about 2,000 stonefly species, about a third of which live in the U.S. and Canada. Major Families in the Order Family Perlidae - common stonefliesFamily Leuctridae - rolled-winged stonefliesFamily Taeniopterygidae - winter stonefliesFamily Nemouridae - spring stoneflies Families and Genera of Interest Adult stoneflies in the subfamily Isoperlinae appear to be pollen feeders.Female Pteronarcys dorsata stoneflies measure as much as 55 cm in length.Nymphs of the family Peltoperlidae resemble cockroaches.The Lake Tahoe benthic stonefly, Capnia lacustra, spends its entire life cycle (even as an adult) deep within Lake Tahoe. It is an endemic species to Lake Tahoe. Sources Borror and DeLongs Introduction to the Study of Insects, 7th Edition, Charles A. Triplehorn, and Norman F. Johnson.Order Plecoptera - Stoneflies, Bugguide.net. Accessed online February 15, 2011.Guide to Aquatic Insects and Crustaceans, Izaak Walton League of America.