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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.
Explain Regulatory enzymes Regulatory enzymes: Citrate synthase, isocitrate dehydrogenase and a-ketoglutarate dehydrogenase complex are the key enzymes which regulate
This valve has the same basic features as of the Tricuspid Valve. It has an anterior and a posterior cusp. The anterior cusp is larger and is attached on the upper right part of t
Define Unsafe Water and sanitation - public nutrition? Safe water and sanitation may seem tenuous in their link to food security but their impact is unquestionable. With 19% US
Indications for Surgery : Congenital pulmonic stenosis is the most common lesion requiring relief. Very rarely it could be due to rheumatic involvement along with disease of othe
Define about the Chemotherapy - Cancer? Chemotherapy results in lot of side effects. This is because the drug effects are not specific to cancer cells alone. Even the host cell
Explain Precautions for Morphological Study of Fungi? 1. Use sterile forcep and needles for slide culture technique. 2. Aseptic conditions should be maintained. 3. Caref
Why is the carbon dioxide concentration a limiting factor of the photosynthesis process? When the carbon dioxide concentration is increased indefinitely is photosynthesis also incr
Lakes - Lentic Ecosystems Most lakes occur in regions which have recently been subjected to geological changes; say within the past 20,000 years. However, a few lakes, such a
Increase in population size is known as population growth. It depends upon number of persons added to the population and number of persons lost from the population. Addition in pop
Q. Incineration Treatment technologies for health-care waste? It used to be the method of choice for most hazardous health-care wastes and is still widely used. It is a high te
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