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Pollution - Environmental Pollution
Pollution refers to any undesirable change in the physical, chemical or biological characteristics of our environment, i.e. air, water and oil that may or will adversely affect humans or other species and life support systems of our biosphere directly or indirectly. A substance whose introduction into a resource damages the latter's usefulness is called a pollutant. Pollutants are grouped into two broad categories:
The non-biodegradable pollutants such as heavy metals, pesticides, move through the food chain and may get magnified to dangerous levels in higher trophic level organisms. Some of these combine with other compounds and produce toxic substances. However, biodegradable materials such as human and animal wastes, agro-based residues and fertilisers can also pose a threat if their quantities or inputs exceed the Assimilative capacity of the environment.
Type 1 Diabetes Mellitus occurs when the body's immune system destroys beta cells. Beta cells produce insulin, a hormone that helps to move the glucose contained in food into cells
Quantification of Pulmonary Stenosis : Quantification by ECHO By Valve area Mild > 1.5 cm 2 Moderate 0.5-1.5 cm 2 Severe
Effects on Health - Water Pollution Water pollution deteriorates the quality of water used for drinking, bathing, swimming, recreation and irrigation. Water contaminated with
Determine the appearance of a plant cell when water is plentiful? When water is plentiful, the central vacuole expands. The other organelles are pushed against the plasma me
The Word 'disaster' is believed to be originating from the French word 'Disastre' which is a combination of two words 'des' meaning bad and 'astre' meaning star. Thus this term ref
Define Basal Metabolism and Energy Expenditure at High Altitude? The energy and nutrient requirements depend upon total energy expenditure and metabolic rate of the individual.
Which is true of the resting membrane potential? A. It requires few ions to be distributed unevenly. B. It has the same value in all cells C. Only nerve and muscle cells h
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What are other important human diseases caused by protozoans? Some other significant protozoan infections are amebiasis, trichomoniasis, giardiasis, leishmaniasis, toxoplasmosi
Pangenesis Theory (i) Charles Darwin propounded pangenesis theory. (ii) According to this theory every cell, of animal body produces many minute particles kn
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