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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.
How did the experiments of Redi and Pasteur refute the hypothesis of spontaneous generation? To refute the impulsive generation hypothesis many experiments were performed. The
Which of the following does NOT contain a guanidinium group Select one: a. Urea b. arginine c. creatine d. guanidinium ion
Explain Cytological Approach in Taxonomy Cytotaxonomy deals with all the aspects of taxonomy at a cellular level. This includes, the structural, genetic and biochemical aspect
Pulmonary Valvotomy with Infundibular Resection : Infundibular obstruction in cases of pulmonary valvar stenosis could be primary or secondary. 11' this obstruction is signi
Contamination due to Pathogens - Water Pollution Sewage is a source of pathogenic viruses, bacteria, worms and other parasites. The extent of contamination by these pathogens
Degradation of Ecosystem Ancient man was simple-minded food gatherer and hunter. He looked upon nature with awe and respect and in fact he worshipped it. But from the time he
Symptoms of digitalis toxicity include anorexia, nausea, headache, blurring or yellowing of vision, and disorientation. Cardiac toxicity may take the form of atrioventricular condu
Q. Explain Pathology of aortic stenosis? Congenital abnormalities of aortic valve may lead to unicuspid aortic valve. This may be dome shaped with central stenotic orifice. Uni
Define the Factors that Affect the Rate of Drying? Factors that affect the rate of drying are as follow: 1) The fat content of the food-Higher fat contents generally result
Define Nutritional Availability - Microbial Survival and Growth? Food borne microbes are chemotrophs. Generally the types of microorganisms present on a particular food are the
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