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When toxic substances enter lakes, streams, rivers, oceans and other water bodies, they get dissolved or lie suspended in water. This causes pollution of water bodies, which degrade the quality of water so that either becomes health hazard or unfit for use and known as water pollution.
It is defined as deterioration of physical, chemical and biological properties of water brought about mainly by human activities and natural activities which causes harmful effects on human, plants and aquatic life.
Example: Domestics sewage, waste water discharge, industrial effluents, surface runoff water into river and sea.
Which of the subsequent statements concerning platelets is INCORRECT. Platelets: a) Are between 1/2 and 1/3 the diameter of the red cell b) Are roughly disk-shaped c) Hav
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Define the term Prebiotics? Dietary Sources and their Mode of Action/health Effects We have already seen how prebiotics are defined. Let us go a little in-depth about them. Pre
C4 plants have higher net photosynthetic rate because a.they have no photorespiration b.can photosynthesise in low in
How is retaining structure used? A retaining wall helps in maintaining the surface of the ground at different elevations on either side of the structure. If the retaining wall
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What is genotype? What is the difference between phenotype and genotype? The Genotype is the genes, DNA nucleotide sequences contained in the chromosomes of an individual, whic
State the symptoms of epilepsy Three particular symptoms are found in many types of epilepsy: 1) An aura, or warning, of impending seizure: This aura may take the form of a
Basic characters of vertebrate classes
To study the gas produced when yeast acts on sugar Place some clear lime water in a test tube and have a pupil exhale by a soda straw placed in the lime-water. Soon the lime-wa
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