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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.
Chronic Mitral Regurgitation : In chronic mitral regurgitation, the asymptomatic phase is much longer than in mitral stenosis. Onset of symptoms may also mean the onset of l
why do ecological models commonly have limited applications?
A useful way to grow seeds Tie a piece of cloth over the mouth of an old potted meat jar. Permit extra cloth to hang down the sides and dip in about 2 cm of water contained in
How much SDS do you need for 50 ml of a 20% SDS solution in water(weight/ volume)? SDS is a solid.
A few statements about the mechanism of evolution are made. Mark the correct statements. (i) Evolution happens at the individual level as well as population level. (ii
Q. Foods for Growth in microorganisms? Microorganisms differ in their ability to use various nitrogenous compounds as a source of nitrogen for growth. The primary nitrogen sour
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Explain Dehydration Dehydration is one of the ancient food processing techniques. Dehydration means to completely remove water under controlled conditions, in such a way
For an individual having a genotype formed of two different alleles that condition different varieties of the same phenotypical trait, upon what will the phenotypical feature actua
Name the subcellular particle where the electron transport chain is located. Mitochondria is the subcellular particle where the electron transport chain is located.
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