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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.
Describe the Male Reproductive System? In addition to the primary sex organs, the testes, there are accessory structures that store, nourish, and activate the sperm, and conduc
Food chain is the simplest representation of energy flow in the community. At the base is energy stored in the plants, which are eaten by the small organisms, which in turn are ea
1) It is the series of coupled oxidation/reduction reactions where the electrons are passed like hot potatoes from one membrane-bound protein/enzyme to another before being finally
Cardiac Output - Circulation The cardiac output can be determined in a number of ways. The most common method is the Fick's principle. A. Fick a German physiologist in 1870 de
Q. Explain the factors on which Spoilage of fish depends? i) The type offish. Different types of fish are susceptible to spoilage due to shape and size. A fat fish is suscept
characteristics of protozoans
Explain the Productivity of ecology? When scientists study an ecosystem as a whole, they often examine the relationships between feeding, or trophic, levels. In order to do th
what is the biological significance of the skeleton and supporting system in animals
How do mineral salts participate in osmotic regulation? Osmotic pressure depends on the number of particles dissolved in a solution and not on the nature of such particles. Min
Define Application of Nutrition Knowledge in Geld of Sports? By the time you are ready to do this unit, you have been exposed to a good deal of the basic knowledge of nutrition
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