NEET BIOLOGY

Detailed explanation-1: -Biomagnification results from the process of bioaccumulation and biotransfer in which the tissue concentration increases in organisms higher up the food chain as a result of predation (see Figure 5). As it is consumed throughout the food chain, the contaminant concentration can increase until it reaches a toxic level.

Detailed explanation-2: -Bioaccumulation and subsequent trophic transfer of a contaminant may result in the biomagnification of these contaminants at higher trophic levels [27].

Detailed explanation-3: -Bioaccumulation begins when a chemical passes from the environment into an organism’s cells. Uptake is a complex process which is still not fully understood. Scientists have learned that chemicals tend to move, or diffuse, passively from a place of high concentration to one of low concentration.

Detailed explanation-4: -Biomagnification is the accumulation of a chemical by an organism from water and food exposure that results in a concentration that is greater than would have resulted from water exposure only and thus greater than expected from equilibrium. From: Treatise on Geochemistry, 2007.