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State the important role of microorganisms
The important role of microorganisms was recognised as early as 1838, when J.B. Boussingeutt a French agricultural chemist observed that legumes could utilise the atmospheric nitrogen for their nutrition. It was further confirmed when, M.W. Beigerinch, a Dutch scientist, isolated bacteria from root nodules of legumes. Investigations have shown that soil is not an inert body but a medium pulsating with a large number of microbes that are always viable and active and thus full of life. These organisms transform soil structure as part of their normal activities and add fertilizers and organic matter to the soil.
IRON It is present in bread, potatoes, green vegetables, especially spinach, lettuce, cocoa, raisins, red meat, liver, kidney, egg yolk etc. Iron is also available in the bo
Metals and Alloys in alloplastic implant materials Most of the dental implant systems are made of metals or their alloys. Currently commercially pure titanium and its alloy Ti-
Aim : To prove that light is essential for photosynthesis. Apparatus : A potted plant, a light screen, beaker, iodine solution. Procedure : Keep a potted plant in darkness for tw
Explain the Heat Fixation Method? This is the usual method. Here, bacteria is fixed by gentle heating of air-dried bacterial film, which results in coagulation of bacterial pro
Q. What amount of catalyst is obsessive in the reaction it catalyzes? Catalysts are not obsessive in the reactions they catalyze.
Excretio n I n Animal To give out nitrogenous waste products after oxidation of food is excretion. EXCRE T O R Y MATERIALS - 1 . AMMONIA - Animals are
Measles: The causative organism for measles is paramyxovirus. Disease spreading takes place through the nasal discharge and saliva of persons affected with measles by dro
differentiate between scanning electron microscope and a transmission electron microscope in terms of their functions
Define Guidelines of School Children and Adolescents? 1) Do not skip breakfast. At least have milk, fruit and cereal. Some children prefer to flavour the milk with cereal or pr
Define the Principle behind Cyanmethemoglobin Method? The principle behind the cyanmethemoglobin method is as follow: Principle The haemoglobin is treated with a reagent con
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