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This was the probable lifestyle of early man. Scientifically, nearly 98% of human genes and chimpanzees are identical showing the biological closeness to humans. The cardinal difference between the two is the human brain size that is larger and complex. This makes man to communicate through speech, walk upright among others (Ruse, p.23).
About five million years ago, australopithecines evolved from the apes. It had small canine and was bipedal. This was the earliest human species. There were two major australopithecine groups; robust and gracile. The main difference was the jaw and teeth size. From australopithecine, the next probable evolution was the Homo habilis. This represented the modern man and Louis and Mary Leaky in Tanzania found the evidence. The primate was bipedal, upright and would use forearm to handle tools and weapons. It had increased brain size than the former and climbed ability suppressed. They had opposable thumbs (Ruse, p.43).
From the Homo habilis, there came the Homo ergaster that led to Homo erectus. This then led to Homo sapiens. The changes in the humans also showed changes in other primates such as the Chimpanzee. However the primary characters of the family bond, use of hand remained. The Chimpanzees just like humans are in the ape family. The differences in brain size, fur and eyes demonstrate the evolution that has occurred. Many similarities point to a similar origin. The similarities include the family bonding, the use of facial gestures such as surprise and comfort, omnivorous in nature, bipedal (Ruse, p.69).
Neolithic revolution lead to a widespread change in human lifestyle from the era of hunting and gathering to agriculture and settlement era. This enabled the humans support the fast growing population. This Neolithic revolution has led to improved health and longevity as well as morbidity. With Neolithic
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The use of bipedality is one of the alternatives which have evolved through time among homo sapiens. This is directly attributed to not only needs for maneuvering and basic functions. Many theories also show that bipedality is related directly to the climate change and the stress which this caused on the human body.
Humans physically recognizable as similar to people alive today appeared in the same regions about 35 000 years ago (Trinkaus 1978: 124). Evidence does exist from scientists’ calculations using human genetic coding to show that the oldest known single ancestor of the people living on the earth today existed about 200 000 years ago (Gugliotta 2008:140).
Evidence of the evolvement of Homo sapiens from Homo erectors has mainly been provided through analysis of human fossils that have shown that certain changes did occur in the brain and body size, diet, movement The changes in the millions of stone tools and footprints have also helped in the understanding of the evolution of Homo sapiens.
There is numerous and convincing evidence that living organisms have undergone the process of evolution spanning over a period of millions of years. The account of human evolution dates back to approximately 30 million years ago in North Africa, when the now expansive Sahara desert was an expanse of lush rain forests, and the region was inhabited by a species identified by historians as Aegyptopithecus.
The Homo class of hominin ancestors was particularly problematic in initial studies since it was at largely referred as the transition class to modern man.
Homo erectus evolutionary and adaptive traits from the several species discovered across the world revealed that
ientists to recognize and study the changes that have occurred in the size of human body and brain, diet, locomotion and other aspects of the human evolutionary course that has occurred for the last six million years. The evolution of man has entailed many changes in the way of
Their existence was as a result of change in climatic conditions. This is because the period primates came into existence was also marked by changing environmental condition of pro-longed cold and dry period. These
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