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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.
Ethylene - Plant Growth Substances This hydrocarbon C 2 H 2 is a gas and is unbelievably a small and simple molecule to be accepted as a hormone. Ethylene is not produced by
Q. Explain about biological diversity? Biodiversity or biological diversity is a neologism and portmanteau word, from bio and diversity. It is the diversity of and in living na
Shell - body form Protozoans Majority of protozoans posses an exoskeleton in the form of a shell, also called test. The shell forms a loose covering around the body of the ani
The biomass available for consumption by the herbivores and the decomposers is called : 1. Net primary productivity 2. Secondary productivity 3. Standing crop 4. Gross
Reasons for Uneven Distribution of Power The causes for uneven distribution of the power of regeneration among animals are not noticeably known. From a survey of the regenerat
Flagellates - Parasitic Protozoan Several flagellate protozoa parasitise man and live in the blood stream or tissues of the reticulo-endothelial system. Most significant of th
What is cloning? The Cloning is the making of an organism genetically identical to another by means of genetic engineering. The foundation of cloning is the nucleus transpla
Define briefly about the Nuts as protein source? Nuts are excellent sources of proteins. Examples of nuts include cashew nuts, almond nuts , hazel nuts , coconuts, walnuts, bra
Define the Diet intervention for lactose intolerance? Lactose is present in dairy products such as milk, cheese, yoghurt, ice cream etc. Hidden sources of lactose may include
Major role in contributing towards motivation. Psychological factors: Depression, anxiety or phobia induced by illness, life- style changes or medication effects, may hinder
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