question_answer 21)

  Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as (a) eutrophication            (b) pollution                      (c) bio-magnification       (d) accumulation

Answer:

                  (c) Bio-magnification is the accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level. The maximum concentration of these chemicals are accumulated in human beings as they occupy top level in any food chain. Eutrophication is the process by which a water body becomes enriched in dissolved nutrients that stimulate the growth of aquatic plant life usually resulting in depletion of dissolved oxygen. Pollution is the introduction of contaminants into the natural environment that cause adverse change,