Friday, February 22, 2019

Evolution of the Genus Homo

Evolution of the genus valet. Charles Darwin was the basic to formulate a scientific rock for the theory of evolution by Natural Selection. The idea of natural survival of the fittest is basic eachy the survival of the fittest. Evolution is any change in characteristics in biological populations. It gives diversity to life on all known biological organizations such as molecules, organs, organisms, etc. Life is give tongue to to be originated from a universal common ancestor, which tells us that all life is related to to each one other.Life started from simple celled organisms known as prokaryotes, which spudd into eukaryotes after photosynthesizing bacteria evolved forcing oxygen stringency to rise in the atmospheric. This event known as the Great oxidation Event acted as poison on many bacteria that usage carbon dioxide as an energy source. After the evolution of eukaryotes, sexual fostering appe bed and increased the evolution rate tremendously. Complex multi-cellular or ganisms started to appear soon after, first of all in oceans and then on land.Over time, life diversified into millions of organisms. The genus Homo first evolved around 2. 5 Ma from Australopithecine genus (now extinct). The first homo species believed to evolve were called Homo Habilis. They lived side by side with another homo species called Homo erectus until at least 1. 44 Ma. H. Habilis were in addition the first species to make tools taboo of stone. H. Erectus resembled young mankind and colonized in Africa. They had a brain surface 74% that of modern humans and had ways of making better tools and also hunted bigger animals.Another species, Homo Antecessors were common ancestors of humans and H. Neanderthals. Modern humans shared 99% of their DNA with Neanderthals and Neanderthals also had a similar gene linked to speech. Another species, Homo Heidelbergensis may be an ancestor of Neanderthals and modern humans. Finally, modern humans or Homo Sapiens are said to first a ppeared around 200 Ka around Oma river, Ethiopia. There are 2 famous models that explain where the modern day humans originated from. Both models are supported by evidence and therefore are accept by different scientists.The Replacement model says that modern humans originated in Africa and replaced all other archaic humans beginning 60,000 years ago. The regional doggedness model argues that all modern human evolved more or less(prenominal) simultaneously in all major parts of old dry land from local archaic humans. It is believed that environmental variables, along with natural adaption, such as pathogens, diet, survival needs, climate, etc. caused the different phenotypic diversity among human populations and then complicating the puzzle of modern human evolution.

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