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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.
How do the availability of water and light and the climate affect the growth of a population? The availability of water and light and the climate are abiotic factors that limi
Which of the following cells of the immune system is most likely to be directly involved in the rejection of a transplant? Answer plasma cells eosinophils basophils T lymphocytes m
what is a cell
Q. How Drying used for sterilization? Moisture is essential for bacteria, drying therefore has a deleterious effect on most bacteria. Spontaneous drying can often kill bacteria
How to increase in sodium conductance A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM. The neuron is healthy. At 2 AM, the ph
Discuss about the function of Tear Film in short. Functions of Tear Film The normal function of the eye is dependent on sufficient supply of tear fluid- a secretion
What are the processes involved in the preparation of plant tissue for free hand sectioning?
Rice milling Rice milling involves the following processing steps: rough rice (paddy rice) → hull removal → brown rice → polishing to remove the bran coats (fruits and seed
Q. Causes of Mitral Regurgitation? Mitral regurgitation is the most common valvular abnormality seen in clinical practice. Different disease processes leading to mitral regurgi
Independent assortment has which of the following effects on the inheritance of alleles? a.Alleles on the same chromosome are not always inherited together. b.Alleles on diff
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