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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.
What are the etiological agents of malaria? The etiological agents of malaria are protozoans of the genus Plasmodium. There are four dissimilar types of plasmodia that cause ma
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Explain in detail about Male Reproductive System The male reproductive organ consists of the following: A pair of testes, held in scortum; produces spermatooa and testoster
what is tolerance range ? define and explain it ?
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