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It is the process of separating colloidal and suspended impurities from water by passing it through a porous bed made of fine sand and other proper sized granular materials. Filtration is carried out in a sand filter. It consists of a top thick layer of fine sand, placed over coarse sand layer followed by gravel. Water comes from the top.
Small micro-organisms present in sand voids decompose organic matter and remove some of the biological impurities.
Consider an ecosystem consisting of a prey and a predator. If H is the density of prey, P is the density of predator, r is the intrinsic rate of prey population enhance and q is th
Explain brifly what is Genetic Engineering ? Genetic Engineering : Engineering techniques have been used in agriculture and horticulture for centuries. Certain plants or ani
the Mendel's first law? A Mendel's first law postulates that a characteristic (trait) of an individual is always determined by two factors, one inherited from the mother and th
Q. What are the roles of ATP and NADPH in the chemical stage of photosynthesis? NADPH acts as reductant of carbon dioxide it delivers highly energetic hydrogen to precursor mol
Cohesion-adhesion theory describes the properties of water which help move it through the plant. Cohesion is the property of water molecules to stick together (held by hydrogen bo
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
What is biology
Q. What is the association between inflammation and fever? In the tissue region where inflammation occurs prostaglandins, cytokines, bacterial toxins, interleukins and endothel
Pericardial Effusion: Indications for Surgery: Pericardial effusion may be the result of peiicarditis due to infection, autoimmune disease or neoplasm. Non-inflammatoly diseases
CRP is a marker of systemic inflammation. As the role of inflammation in the initiation and progression of atherosclerosis becomes better understood, CRP has gained prominence as a
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