Question

describe the theories regarding the origin of human being

Answer 1

. The research on the origins of humankind has been enriched with many considerations, especially in the field of paleontology. They provided new basis for the understanding of the evolutionary patterns preparing the appearance of human beings on Earth, which occurred rather late in the history of the living beings. The precursors of the Vertebrates are recognized to be life forms inhabiting our planet in the Cambrian period, about 500 million years ago. The earliest forms of fish developed 450 million years ago, while the earliest Amphibians and Reptiles appeared 350 million years ago. Starting 200 million years ago, the Tertiary Era was characterized by the development of Reptiles, Mammals and Birds. The earliest forms of Primates date back to about 65 million years ago. It was only late in the Tertiary period (about 3-4 million years ago) that one of the branches of the Primates evolved into humans. Although it is impossible to answer all the questions raised on the origins of human beings, the paleontological records brought to light in the last 150 years provide the basis for an evolutionary theory, which appears to be solidly established. In this context, the analogies suggested by morphology and compared physiology of living beings, to which Darwin and other 19th-century evolutionists resorted, are only one of the elements suggesting biological and human evolution. Human fossils as well as molecular genetic and biochemical evidence demonstrate the existence of early life forms, which developed before and prepared the present living beings.

Answer 2

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Explanation: Charles Darwin theory of evolution was a basic force in shaping of modern mind. His work origin of species, caste of universe as given by the church or Newton he holds that their are many similarities physical structure and function of animals and men which is the higher product of evolution men is a mammal as well as vertebart and has common ancestry with them.