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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.
Q. What are the euchromatin and heterochromatin? Chromatin is uncondensed nuclear the DNA the typical DNA morphology in interphase the phase of the cell cycle in which the cell
Q. What is the first polar body? How different is it from the oocyte II? In oogenesis the oogonium differentiates into oocyte I (2n) and this cell enters meiosis and after fini
1. What are the examples of helobial endosperm
What is extracellular digestion? Extracellular digestion is that in which food breaking into utile molecules that can be internalized by the cell is completed in the extracellu
characteristics of class mamalias
why obelia is considered to be of special interest in zoology as an animal showing an intermediate grade of organisation
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human digestive system
What is the meaning of Schizogony? A form of asexual reproduction found in some protozoans. An already multinucleated cell undergoes cell division which results in each daughte
Define Oral rehydration for treatment for pem? Since diarrhoea is very common in severe PEM, correction of dehydration is the first step in the treatment. Homemade (salt-sugar
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