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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.
Illustrate the theory of Goldman according to corneal transparency. Goldman's Theory: The fibrils are small in relation to light and do not interfere with light transmissi
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Give three examples of genetic engineering that are intended to improve crop plants. Genetic engineering of crop plants can improve resistance to pests, retard ripening, impro
Modalities Available for Sterilization The most accepted methods of sterilization can be classified as follows: Physical Agents: These comprise of: Sunlight Drying
why the small intestine is longer in herbivores as comparison to carnivores animals
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The nature of the sounds produced by percussion (tapping) a patient's chest can tell a physician a great deal about the condition of the organs within the thoracic cavity. Healthy,
African swine fever African swine fever (ASF), a highly contagious viral disease of swine and other porcine animals (generally confined to the African continent, part of Weste
scientific names of animals
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