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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.
Define Absorption, Storage and Elimination of Vitamin D? As we have already mentioned earlier, all fat-soluble vitamins share a common metabolic fate. Vitamin D is absorbed al
Q. What are some representatives of the echinoderm phylum? Starfishes, sea urchins, sea cucumbers (holothurians) and brittle stars are examples of echinoderms.
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A proton accelerates from rest in a uniform electric field of 650 N/C. At some later time, its speed is 1.3 106 m/s. (a) Find the magnitude of the acceleration of the proton. m/s2
Describe Lifetime Risk Estimation ? Traditional statistical and epidemiological methods of estimating long-term risks do not accurately reflect population burden of disease. Th
Define Functions of sodium and chloride? So far you have learnt that most minerals participate in important functions of body as they support the activity of specific enzymes.
Define the genetic growth pattern of infant? It takes 1-3 years for an infant to establish his own genetic growth pattern. Once this figure is established (such as height-for-a
What is the difference between alpha glucose and beta glucose? Why are they different?
How many cells are in the average human brain? Roughly, 6 trillion are in the average human brain.
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