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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 Conjunctival Xerosis - Micronutrient Deficiencies? Conjunctiva in nonnal children is bright white, smooth and glistening. Conjunctival xerosis is characterized by drynes
Define Food Safety and Regulation? Food sanitation because related to public health and food plant processing; FDA and USDA rules and regulations; food ingredient labelling; nu
During the last 90 years, man-made materials and devices have been developed to replace parts of living systems in the human body. These special materials function in intimate cont
M e t h ods of curing Curing ingredients are applied in dry form or as a solution of curing ingredients in water (pickle or brine). The combination cure is applied in the i
1. Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black.
Pseudopodia – Protozoans Pseudopodia are flowing cytoplasmic protrusions of the cell causing amoeboid movement. In protozoans pseudopodia exist in several forms. The most fami
Q. How are the three major arthropod classes characterized according to the body division? In arachnids and crustaceans the head is fused with the thorax forming the cephalotho
What is allele frequency? The Allele frequency is the percentage of appearances of an allele in the genotypes of a given population (compared to the other alleles of the studie
what is ecological pyramids
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