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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.
EPIDIDYMIS - All seminiferous tubules form short straight tubules as tubuli recti, open into wider network of rete testis. From rete testis 15-20 fine convoluted tubules,
Head - Structure of the Sperm It exhibits a diversity of shapes in different animal groups, e.g., spherical (teleost fishes), rod or lance shaped (amphibians), spirally twist
Explain about the Niacin - Water Soluble Vitamin? Niacin is chemically synonymous with nicotinic acid although the term is also used for its amide (nicotinamide). Nicotinamide
Role of Private Sector in Health Care - Contracting The government can transfer some of its work to the private sector by contracting. If the cost of resultant services (inclu
Counselling refers to professional guidance in resolving personal conflicts and emotional problems. Counselling is a process which enables a person to identify problems and find a
Polysaccharides are vast chains of sugar units joined together. The chains should be branched or linear depending on the polysaccharide. In animals, excess glucose is stored as
Define Foaming Properties, Binding of Flavour and Other Substances? To understand the foaming properties of proteins, we need to know some basic aspects of foam foods. Foam foo
Define the Different Forms of Protein Energy Malnutrition? The term PEM is used to describe a wide range of clinical conditions ranging 'from the very clinically detectable flo
what are the two main pollutants that contribute to acidic rain?
Q. What is Coronary artery disease? Nutrition is a basic prerequisite for maintaining a desirable body weight and that diet has a major role in the prevention and treatment of
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