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Biological Oxygen Demand - Effect on Water Bodies
Addition of biodegradable matter exerts demand on oxygen of the water body. The demand of oxygen is directly related to increasing loads of organic matter and is expressed as biological oxygen demand (BOD).
It is the measure of dissolved oxygen required by aerobic decomposers to break down organic matter present in a given volume of water over 5-day incubation period at 20°C. It is expressed in parts per million or mg of oxygen per litre. A high value of BOD indicates the high activity of aerobic decomposers which in turn means more organic wastes or sewage in water.
High energy fixation - Nitrogen Fixation Through cosmic radiations, lightning, volcanic activity and meteorite trails which provide the high energy needed to combine atmospher
L A W S OF CLEAVAGE - 1. Sac's Law - According this law, during cleavage each blastomere to form similar blastomere. New cleavae always take place at the right angle of th
Q. What is Galactosemia? Galactosemia is a genetic disorder caused by deficient functioning of any of these three enzymes namely galactokinase, galactose -1 - phosphate uridyl
Define WHO classification for assessment of vitamin A status? In addition, to the above mentioned manifestations, thickening of the hair follicles (follicular hyperkeratosis) i
PROJECTS THAT HAVE TO BE DONE IN SCHOOL ABOT PICICULTURE
Pneumothorax Entry of air in the pleural cavity is called pneumothorax. It may be spontaneous, result of penetrating or non-penetrating injuries. Closed Pneumothorax
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In eukaryotes possibly the most rapid and complex signaling is mediated through nerve impulses. The Nerve cells (neurons) consist of a cell body with numerous projections
Hypomagnesaemic tetany of calves Young calves in the age group of 2-8 weeks and fed whole milk or milk replacer are more likely to develop hypomagnesaemia due to inadequate ma
Q. Show Nutrition guidelines for prevention of heart disease? Nutrition guidelines for prevention of heart disease as suggested by WHO are highlighted. Details regardin
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