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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.
What do you understand by Flagella. A cellular hairlike locomotory structure which comprise an extension of the plasma membrane surrounding a 9+2 organization of microtubules.
Hemicellulose In plant cell walls, the most abundant compound present is α-cellulose with long fibers embedded in a matrix of cementing compounds (matrix polysaccharides). Thes
Explain Physical properties of an oil Physical properties of an oil or fat are of critical importance in determining its functional characteristics or use in food products. One
DEFECT S OF NERVOUS SYSTEM - 1. Ataxia - Lack of muscle-cordination due to damage of cerebellum. 2. Dyslexia - In ability of a person to comprehense written l
Q. What is the important condition for a protein to be identical to another protein? For a protein to be identical to another protein it is necessary for the sequence of amino
What is the logic of the transfusional compatibility concerning the ABO blood group system? A transfusional compatibility for the ABO system takes into account the antigens pre
What are the types of good in the demand curve? Some types of good are as follows: • Normal good: When incomes of consumers/households increase the quantity demanded wo
Assortment is a method in which the meiosis produces new combinations of the genetic information. The paternal and maternal chromosomes line up randomly during the process of syna
Better coal should have following characteristics (1) It should have high calorific value. (2) It should have low moisture content. (3) It should have low ash conte
In this unit you have learnt that heart failure is one of the most common conditions seen and results in a high mortality. It can result from failure of the heart muscle as with co
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