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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.
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
Explain the Parts of the Microscope? Microscope, as you may have noticed in Figure or for that matter even seen in a laboratory, is a metal body composed of a base and an arm t
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Carbon is important constituents of all organic compounds. It forms 49% of dry weight of the organisms. Earth atmosphere contains 0.03% carbon dioxide gas. The c
Response to Cold - Responses of Plants to Stress Let us first see what happen to a plant when it is exposed to a cold climate with temperatures below 0°C. If the temperature i
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#question.give the classes of protozoa phylum in detail with examples .
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