Home Biology Ecosystem Previous Year Questions Which biological process leads to decrease i…
Biology Ecosystem Previous Year Questions Single Correct MCQ
Published on: August 12, 2026

Which biological process leads to decrease in fish-eating bird population near a water body containing toxicants from industrial drainage?

A
Biochemical oxygen demand
B
Accelerated Eutrophication
C
Biomagnification
D
Algal bloom

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The correct answer is:
C

Toxic chemicals from industrial waste accumulate in organisms and increase at each trophic level. Fish-eating birds receive the highest toxin concentration, causing population decline.

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