Prelims 989

Consider the following statements:
1. Bioaccumulation is the increase in concentration of a pollutant from the environment in an organism.
2. Bio magnification is when a toxic chemical increases in amount each time it moves up a food chain.
Which of the statement(s) given above is/are correct?
1 only
2 only
Both 1 and 2
None of these
Explanation :
Bioaccumulation is defined as the increase in concentration of a substance(s) in an organism or a part of that organism.Toxic substances are lipophilic or fat-loving, the reason why these substances are deposited and concentrated in the fat tissues of the organisms. Biomagnification is also called Bioamplification. It is simply the increase in concentration of a substance in a food chain, not an organism. Persistent organic pollutants (POPs) are compounds that biomagnify. Persistent organic pollutants (POPs) are chemical substances that persist in the environment. These substances bioaccumulate through the food web and pose risk not only to humans but also other living organisms because of their adverse effects.