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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 are mineral salts, water and food (sugar) transported throughout the plant? Mineral salts, Water and sugar are transported throughout the plant through conductive vessels f
Determine the term -Stolon. In a number of colonial cnidarians, ascidians, and lophophorans, a cord of tissue connects different zooids of colony to each other. Buds on stolon
Define Eggs as a rich source of protein? Roughly, the chicken egg consists of 11% shell, 31% yolk and 58% white. Liquid whole egg consists of 65% white and 35% yolk. The primar
Sticky sweet method Richwil crown and bridge remover -It is a resin block of water-soluble , like a stick sweet -It is first softened in hot water -Placed on the restorat
Sally Subcloner wants to clone a fragment into pUC19 (Map above - From New England Biolabs). Her fragment was a protein coding gene of 2.7 kb, and had Xho I sites on either end (a
what is another test for pentoses? what is the positive result for this test?
Mechanisms for Response – Protozoan Protozoa are sensitive to many kinds of stimuli like touch, temperature changes, light, chemicals, etc. It is not clear how they do so but
Properties of Sols Sol, is a solid liquid dispersion with solid or semi-solid particles dispersed in a continuous liquid phase. For e.g. starch in cold water. Sols exhibit ch
Two gene loci, A and B, assort independently, and alleles A and B are dominant over alleles a and b. Indicate the probability of producing: An aB phenotype from a cross AaBb x AaBB
Extracellular Aging The basic components of extracellular space are mucopolysaccharides and fibrous proteins, particularly collagen and elastin. These proteins are synthesised
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