The Fossil Records and Theories of Evolution

The Fossil Records and Theories of Evolution. Introduction In general, the term ‘evolution’ can imply a drastic or gradual change from a very broad perspective. Life on earth, the universe,galaxies, as also the earth in general have evolved through millions of years. In this essay we consider only one aspect of evolution emphasizing on evolution as a biological tool for change among species and consider fossil record as supportive of both evolution theories and also the other theories contrary to evolution. Evolution is the central unifying concept, a theory that successfully connects biology, palaeontology and other branches of science. Evolution is a gradual descent of organisms accompanied by changes that help the organisms to adjust and adapt to the surroundings. ‘Descent with modifications’ as Darwin contended implies changes in organisms in successive generations (Mayr, 1976). These changes are triggered by the derivation of new species and there is a change in the properties of populations of organisms and these properties tend to transcend the lifetime of any single individual. Newers pecies are modified versions of older species. Although, individual organisms do not biologically evolve,populations evolve when heritable genetic materials are transmitted from one generation to another. Biological evolution can range Read more…
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