A) biomagnification
B) bioaccumulation
C) biodegradation
D) bioinvasion
Correct Answer: A
Solution :
Biomagnification refers to increase in concentration of the toxicant at successive trophic level. This happens because a toxic substance accumulated by on organism cannot be metabolised or excreted and is thus passed on to the next higher trophic level. This phenomenon is well known for mercury and DDT. Bioaccumulation refers to the accumulation of substances such as pesticides or other chemicals in an organism. Biodegradation is the chemical dissolution of organic matter by bacteria, fungi or other biological means into nutrients that can be used by other organisms. Bioinvasion is the rapid expansion of a species into regions where it had not previously existed, often as a result of human agency.
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