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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.
FUNDAMENTAL CHARACTERS OF EMBRYONIC DEVELOPMENT 1 . GAMETOGENESIS- Testes & ovaries are collectively called as gonads. Similarly sperms & ova are collectively calle
How plants solve the problem of transporting substances throughout their tissues? In the bryophytes the substance transport is done by the diffusion. In the tracheophytes (pter
Q. Non-Modifiable Risk Factors for coronaru heart diseases? Non-Modifiable Risk Factors 1. Age 2. Sex 3. Heredity 4. Endomorphic Body Build Family history: Pe
Define the meaning of Population Structure? The structure of population can be viewed as to how the population is composed of in terms of age and sex. The structure of populati
The main objectives of study of ecology are: (i) To study the distribution of biota local and geographical level. (ii) To study the interrelationship
While waiting at an airport , nail Campbell once overheard this claim, its paranoid and ignorant to worry about industry or agriculture contaminating the environment with chemical
name five animals in it''s trinomial nomenclature.
Sickling occurs in deoxyhemoglobin, but not in oxyhemoglobin. Normal deoxyhemoglobin (HbA and HbS) molecules have a small hydrophobic "pocket" on the surface of a ? chain. In oxyhe
is thare any excretory system found in echinoderms
Pesticides - Danger to Wildlife Another recently realised danger to wildlife in many parts of the world has come from the development of more effective pesticides. As agricult
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