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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.
Evolution can be explained as follows 1) The change in the life over time by adaptation, over-reproduction, variation and differential survival/reproduction, a procedure refer
What is Polysaccharides? Polysaccharides: Many monosaccharide subunits can be joined to form long, complex polysaccharide molecules. These complex sugars are often used to s
Fragmentation - Types of Asexual Reproduction Fragmentation is a phenomenon where parent animal spontaneously (on its own accord) splits into two or more fragments. Each one o
What are the endocrine functions of the placenta? The placenta has endocrine function since it secretes the hormones progesterone and estrogen that maintain the endometrium (in
Explain Tropical Rain Forests in biomes? You probably are well aware of the danger that the world's rain forests are facing in terms of extinction! There are huge numbers of sp
Q. Prevention of Coronary Heart Diseases? In view of the steep rise in the incidence of chronic degenerative coronary heart diseases, several programmes have been formulated to
Fumonisins The most recently characterized mycotoxins of any major significance in human health are the fumonisins produced by species of Fusarium, such as F. moniliforme. Like
Which of the following molecules has more direct effect in learning and memory? A) norepinephrine B) epinephrine C) glutamate D) acetylcholine E) glycine Please leave justification
Mixed Mitral Stenosis and Regurgitation The most common cause for a combined lesion is rheumatic, Very rarely; it could be of congenital origin. Regurgitation in a stenotic val
Apical Ectodermal Ridge (AER) We have described earlier that the AER persists at the tip until the last phalangeal cartilage begins differentiation. The following experiments
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