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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.
PEROXISOMES AND GLYOXYSOMES Certain small ovoid unit membrane bound sac like cytoplasmic organelles, resembling lysosomes in size and appearance were isolated from var
List the five kingdoms into which most living organisms can be classified. Most living organisms can be classified as a) Bacteria, b) Protozoa, c) Fungi, d) Plants,
Cholesterol is the precursor of the five major classes of steroid hormones.The synthesis of steroid hormones is initiated by the removal of a six-carbon unit from carbon 20 of
what is the technical term used for the animals that eat yellow grass?
STRUCTURE Golgi body consists of :- (1 ) Cisternae These are plate like unbranched structure with dilated ends. One golgi body has 4-8 cisternae. Mono cisternal
Which of the below is usually referred to as "master gland" because it regulates so many body activities? Is it: a) Pituitary gland b) Thyroid gland c) Adrenal gland d
Describe three mechanisms cells use to produce diversity of ion channel structure and function.
How can the immune memory lead to the efficacy of vaccines and also produce allergies? Vaccines are controlled inoculations of fragments of infectious agents or of inactive inf
Cation Saturation and Nutrient Absorption by Plants The availability of adsorbed cations is not always so easy as the above explanation might suggest. This is because, several
Genetic Defect in Pyruvate Dehydrogenase A defed in any of the protein subunits of PDH can result in decrease or complete loss of activity. Severe cases are usually fatal. Sy
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