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Periods of human development
Background of human development
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The following information is a researched paper on the conditions and evolution that made human beings. There of course comes great controversy with this topic. Many scientists and people in general see the human race as completely evolved. The main and simple argument of anti evolution-debaters is that there is no record of humans evolving drastically in recent history. Another common argument is simply why are there still monkeys if we have evolved from them? This paper will provide evidence that proves these assumptions wrong. significant research has been done to show that we are, in fact, still evolving.
There has been a significant amount of research and supporting the fact that we are still evolving. When thinking about evolution most people think way back to the time we evolved from apes. So when asked today if they believe we are still evolving most people will say no because we aren't evolving in the most obvious ways. The fact that we still drink milk, have blue eyes, humans are losing our wisdom teeth, our brains are shrinking, and how humans are resisting diseases are just a couple of reasons and proof that we are still evolving today. In This paper there will be evidence to show and back up every one of those facts.
The facts and research on evolution is so important in our wold today that we all must really understand it. Correctly understanding evolution is crucial for understanding biology as well. Scientist Theodosius Dobzhansky said, “Nothing in biology makes sense except in the light of evolution.” Evolution proves to be the only scientifically backed up explanation for human diversity. It shows us the connection between vastly different forms of life. As well as showing the changes and evolution of popul...
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...he sole result is the absorption of heat from a reservoir and its complete conversion not work.” or a simpler translation of that definition, "The entropy of a closed system can never decrease". This may seem like it has nothing to do with evolution. In fact it directly connects with evolution and the threes supporting it. Later on in this paper there will be in depth research providing this theory as well as arguments against it.
While technology keeps advancing and we create tools to help us research this even more scientists continue to build up evidence that evolution is accruing today. While there is arguments against evolution The genetic evidence for natural selection and mutations of single gene that show some benefit and thereby spread through a population over time is too strong, and it's continuing to get stronger as technology and knowledge increases.
The evolution of man is constantly in question. While we are reasonably sure that modern humans and primates are both related to the same common ancestor, there is constant debate over what initially caused the two species to split into early hominids and apes. According to some, our longest and most popular theory on the division of man and ape is profoundly wrong. However, those same individuals usually offer an equally controversial theory as a substitute, one that is almost impossible to scientifically test or prove. Both the Savanna Theory and the Aquatic Ape Theory offer solutions to how and why humans evolved into bipedal toolmakers. But with enough questioning, each loses its accountability to rhetorical science.
Human characteristics have evolved all throughout history and have been manipulated on a global scale through the use of science and technology. Genetic modification is one such process in which contemporary biotechnology techniques are employed to develop specific human characteristics. Despite this, there are a countless number of negative issues related with genetic modification including discrimination, ethical issues and corruption. Hence, genetic modification should not be used to enhance human characteristics.
The evolution of the human species has significantly changed during the course of evolution to what is now the modern day Homo sapiens. Some of the changes that have occurred through the evolution are bipedalism, changes in body features such as brow ridges, and an increase in brain capacity.
Anyone with even a moderate background in science has heard of Charles Darwin and his theory of evolution. Since the publishing of his book On the Origin of Species by Means of Natural Selection in 1859, Darwin’s ideas have been debated by everyone from scientists to theologians to ordinary lay-people. Today, though there is still severe opposition, evolution is regarded as fact by most of the scientific community and Darwin’s book remains one of the most influential ever written.
According to Darwin and his theory on evolution, organisms are presented with nature’s challenge of environmental change. Those that possess the characteristics of adapting to such challenges are successful in leaving their genes behind and ensuring that their lineage will continue. It is natural selection, where nature can perform tiny to mass sporadic experiments on its organisms, and the results can be interesting from extinction to significant changes within a species. Human beings are no exception to biological evolution. Like other organisms around the world, humans have significantly changed over time and have developed all sorts of diverse characteristics.
The origin of modern humans is a matter of debate. There are two different theories regarding the origin of modern humans or Homo sapiens. The first and primary theory states modern humans emerged in one place and from a single origin. This theory is known as the Recent African Origin Model. It suggests that modern humans are the product of speciation during the late Pleistocene in Africa. Homo sapiens eventually migrated out of Africa to Eurasia, and replaced all other human populations, without interbreeding. Some of the replaced populations are believe to be the Neanderthals and the Homo erectus. The second theory proposes that modern human evolution happened trough emigration, this is known as the multiregional evolution model. This model assumes that modern humans have an ancient rather than a recent African origin. This theory also talks about how all living humans derive from the species Homo erectus that left Africa nearly two million-years-ago. The multiregional view states that genes from all human populations of the Old World flowed among diverse areas and by coexisting, contributed to how modern humans look like nowadays. In order to understand the rise of modern human, it is important to first learn about the Neanderthals, group who existed and coexisted during the modern human evolution times. The Neanderthals are classified as an extinct subspecies of modern humans known as Homo sapiens Neanderthals, or as a separate human species called the Homo neanderthalensis. Both, the modern human and Neanderthal share some features and differ in others
In order for a species to survive, its population has to evolve. Evolution is the process of gradual change driven by natural selection to improve survival. Evolution is the explanation of how life got to its current state. Before the idea of evolution, the Bible gave the explanation of how things came to be, the Theory of Creation. Charles Darwin is credited for developing the theory of evolution.
Human Evolution. (2010). In A. B. Cobb (Ed.), Animal Sciences. New York: Macmillan Reference USA. Retrieved from http://ic.galegroup.com/ic/scic/ReferenceDetailsPage/ReferenceDetailsWindow
“The scientific study of how humans developed did not begin until the 1800s in Europe. Until that time, people relied on religious explanations of how humans came into existence. Starting in the 1500s a scientific revolution began to sweep Europe. Thinkers started using scientific methods and experiments to try to better understand the world and the creatures living in it. Eventually these methods were turned to the question of human origins” (The Nature Of Human Origins, 1). Earth made it possible for species to change over time because Ancient Earth provides ability to plenty of time.The Homo Sapien a is very complex creature. The species started off very simple by living in caves and surviving with little food and then later evolved into a species that were able to do many more complex things. The first species was Sahelanthropus tchadensis They were one of the most simple humans in that time period and on. They had very small skulls compared to Homo Sapiens today and their motor skills were just the same. We have evolved and changed for the better both mentally and physically. The Evolution of Homo Sapiens started off simple, such as the Neanderthals, and now we are the most advanced species to ever walk the planet so far.
In the Pleistocene Era, hominins have been expanded rapidly in terms of survival, such as availability of food resources, migrating and how they defend their territories. Then, this has been lead hominins to develop intelligence and create a wide variety of tools. However, there is no specific evidence or answer to, how did human beings evolve and where did they come from. Environmental conditions or pressures have been played importantly, that contributed to the selection of the genus Homo in Africa, Europe, Asia, Australia, and there is an anatomical evidence over the past one million years, culminating in our modern genome; leads to developing human cognition and explains why modern humans are the only ones who exists today.
Are we still evolving? How do humans and apes share a common ancestor? Modern human species or Homo sapiens have shown great similarities in the physical and genetic makeup to another group primates species, the apes. Both organisms share a common ancestor dating back eight to six million years ago. Evolution means change over time. Human evolution is the process by which humans have emerged from apelike ancestors. Through sequences of mutations, genetic drift, migration, and natural selection and technology we are able to observe the amazing amount of similarities and diversity of humans to other living organisms. Humans have roamed the earth for about six million years. At least, that is from when the oldest human ancestor was discovered.
The evolution of Homo sapiens is unlike the evolution of any other species on Earth. The differentiation of physical characteristics throughout our evolutionary timescale is not the only factor of our evolution. Culture has played a vital role. Other sp...
2004 Has the Comination of Genetic and Fossil Evidence Solved the Riddle of Modern Humans?, Evolutionary Anthropology 13: 145-159.
The evidence for human evolution begins with the australopithecines. All the australopithecines were bipedal and therefore possible hominines. In details of their teeth, jaws, and brain size, however, they modify enough among themselves to be divided into five species: Australopithecus anamensis, A. afarensis, A. africanus, A. robustus, and A. boisei. Genus Homo are also divided in five different spices: Homo erectus, H. habilis, H. sapiens, and H. sapiens sapiens.
Without evolution, and the constant ever changing environment, the complexity of living organisms would not be as it is. Evolution is defined as a process that results in heritable changes in a population spread over many generations (8).Scientists believe in the theory of evolution. This belief is based on scientific evidence that corroborates the theory of evolution. In Figure 1 the pictures of the skulls depict the sequence of the evolution of Homo-sapiens. As the figure shows, man has evolved from our common ancestor that is shared by homo-sapiens. The change of diet of homo-sapiens over time has thought to contribute to the change in jaw structure and overall skull shape.