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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.
General information about disinfectants A disinfectant is a chemical that kills disease-causing agents on contact. Natural disinfection agents, such as sunlight, heat, keeping
Determine Food Sources of ascorbic acid (vitamin c)? Food sources of vitamin C include: Rich sources: Amla and guava. Good sources: Drumstick leaves, other leafy ve
Long-term responses - Behaviour of Plants Plants alter their course of development to suit the prevailing environmental conditions. For example, leaf maturation and fall, onse
characteristics of protozoans
Define the Prevention of iron deficiency anaemia? As in the case of vitamin A deficiency, correction and prevention of dietary inadequacy of iron are important sustainable meth
GER M LAYER THEORY - Proposed by Pander, studied chick embryo development. Coined the term ectoderm, mesoderm & endoderm.
Biological Stress Since in nature, the various organisms do not live in complete isolation from others, stress to a plant species might also be caused by what other organisms
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A dominant allele will always increase in frequency over time. Yes No Q44. When a gene has two alleles, the allele frequencies in a population automatically move toward an equilibr
Carrier Based Gutta percha Removal “therma-fill” If the cone the carrier is metal and has cutting flutes that are engaging lateral dentin the instrument retrieval system (IRS)
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