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In the last unit we traced the human evolutionary history mostly from a palaeontological viewpoint. Although still fragmentary, the available fossil evidence makes it possible to construct a more or less coherent story of human origin and its development. Besides suggesting a primate ancestory, fossil evidence has indicated various trends in human evolution. Today the modern man is regarded as a climax of the evolutionary process. But several questions are raised as to which direction the human evolution is proceeding now and what direction will it take in the future. Is the be-all and end-all of all the evolutionary process? Or do human beings continue to evolve biologically? It may not be possible to provide a direct answer to these questions since evolution is a long term process and the effects could be visualised only after tens of thousands of years.
Explain the terminology Niche ? The term niche is used often in ecology, and its meaning has been defined and interpreted in various ways over the years. An organisms niche has
Q. Why are vaccines used in the prevention but not in the treatment of infections? Why can antivenom serums be used in prevention and treatment? Vaccines are not used in the tr
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SIMILARITIE S BETWEEN APES AND MAN - Absence of tail. Broadened chest due to flattening of sternum Smaller lumber region due to reduced number of lumbar vertebrae
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An increase in blood plasma levels of parathyroid hormone A. occurs in response to enhance in the levels of calcium ions in blood plasma. B. leads to enhance in the amou
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