Q. Which of the following statement is/are not correct regarding biomagnification? I. Heavy metals and persistent pesticides pass into food chain and increases in amount per unit weight of organisms with the rise in trophic level due to their accumulation in fat II. Accumulation of zinc can cause thinning of eggshell in birds III. DDT accumulation is a major cause of killing of fish-eating birds IV. Biomagnification occurs only in marine food chain

A) I and II
B) II and III
C) II and IV
D) I and III
Explanation

Biomagnification is defined as increase in concentration of toxicants at successive trophic levels. Higher amounts of pesticide disturb calcium metabolism of birds resulting in thinning of eggshells. Biomagnification occurs in all aquatic food chain

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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