Human Evolution :: essays research papers

Evolution is the complexity ofprocesses by which living organisms establishedon kingdom and adjudge been expanded and modifiedthrough theorized changes in form and function.military personnel evolution is the biological and culturaldevelopment of the species Homo sapienssapiens, or human beings. Humans evolved fromapes because of their quasi(prenominal)ities. This can beshown in the evidence that cosmos had a decreasein the size of the face and teeth that evolved. proto(prenominal)humans are classified in ten different types offamilies. Creationists rely that humans werealways humans. Humans are classified in themammalian family Primates. In this arrangement,humans, along with our extinct close ancestors,and our nearest living relatives, the African apes,are sometimes placed together in the familyHominidae because of genetical similarities. Two-legwalking seems to be one of the earliest of themajor hominine characteristics to take away evolved. Inthe course of human evolutio n the size of the understandinghas been more than tripled. The increase in brainsize may be cerebrate to changes in homininebehavior (See figure 3). The third major arc inhominine development is the gradual decrease inthe size of the face and teeth. According to theMicrosoft Encarta Encyclopedia 98, the fossilevidence for direct ancestors of ultramodern humans is dissever into the category Australopithecus andHomo, and begins about 5 one meg trillion million years ago (Seefigure 1). Between 7 and 20 million years ago,primitive apelike animals were widely distributedon the African and, later, on the Eurasiancontinents (See figure 2). Although many fossilbones and teeth have been found, the way of lifeof these creatures, and their evolutionaryrelationships to the living apes and humans, remainmatters of active word among scientists. Theevidence for human evolution begins with theaustralopithecines. All the australopithecines werebipedal and therefore attainable hominines. In details of their teeth, jaws, and brain size,however, they modify enough among themselvesto be divided into five species Australopithecusanamensis, A. afarensis, A. africanus, A. robustus,and A. boisei. Genus Homo are also divided infive different spices Homo erectus, H. habilis, H.sapiens, and H. sapiens sapiens. According toBritannica Encyclopdia, Australopithecusanamensis lived in Kenya amidst 4.2 million and3.9 million years ago. A. afarensis lived in easternAfrica between 3 and 4 million years ago. Thisaustralopithecine had a brain size a little larger thanchimpanzees. Some had canine teeth more stickingout than those of later hominines. No tools of any frame have been found with A. afarensis fossils.According to Microsoft Encarta Encyclopedia98, between about 2.5 million and 3 million yearsago, A. afarensis clearly evolved into A. africanus.A. africanus had a brain similar to that of itsancestor. However, although the size of the