biological magnification ddt

Biological Magnification - Certain harmful substances, usually ones not found in nature but introduced by man, may get into plants and/or animals. These poisonous substances may not be broken down in the body or excreted easily, efficiently and quickly. Instead, they accumulate ..

Due to bioaccumulative characters, these pollutants pass through the food chain and food web. While passing through the organisms, the concentration of pollutants gets increased. This is called bio magnifications. For e.g., 0.5 ppm DDT in grasses gets magnified to 2ppm in sheep..

There are many pollutants like the DDT that are not bio-degradable. These accumulate in the organisms and cause serious health problems. The contamination of water with these pollutants results in their entry into the microscopic plants and animals. These organisms are fed upon by higher ..

They are highly dangerous pesticides having the ability to persist in plant bodies and soil for long period to cause innumerable ecological and health hazards later. Examples: DDT, BHC, endosulfan, heptachlor and chlorda..

Food chain studies help, a) understanding the feeding relationships and the interaction between organisms in any ecosystem. b) comprehend the energy flow mechanism and matter circulation in ecosystems. c) understand the movement of toxic substances and the problem of 'Biological magn..

Fertilizers - For e.g., Nitrate pollution, Ammonia pollution, phosphate pollution Pesticides a) Weedicides - For e.g., Atrazine pollution, 2,4-D pollution, Butachlor pollution b) Insecticides - For e.,g Carbofuran pollution, DDT pollution, BHC pollution, Endosulphan pollution c) Fung..

It is the most widely used instrument in the field of biology. It is a device meant for magnifying biological objects that cannot be seen with the naked human eye. It has two sets of lenses - objective and ocular - that magnify an object in two steps. A compound microscope can g..

Promoting the sustainable system of agriculture which encourages use of as less chemicals as possible in agricultural operation. Reduced use of fertilizers in a method called Integrated Farming System - which promotes the use of all natural resources along with fertilizers. Replacement of c..

The most distinguishing characteristic of life is the boundless diversity in living forms. It is the total living (biotic) component of our bioshpere. Biodiversity can be defined as the variety and variability of all animals, plants and micro organisms found on earth. The diversity is due to the ge..

Pollution and Pollutants - Pollution is defined as an 'undesirable change in the physical, chemical or biological characteristics of air, water and land brought about by man's activities that may harmfully affect living organisms and other resources'. Man, in his quest for a better life a..