Question

Arrange the biotic and abiotic components of aquatic food chain on the basis of biomagnification of DDT.
A. Fish eating birds
B. Water
C. Large fish
D. Zooplankton
E. Small fish
Choose the correct answer from the options given below:

• A. B, D, C, E, A
• B. A, C, B, E, D
• C. A, C, E, B, D
• D. B, D, E, C, A

Hint:

Biomagnification always increases from lower to higher trophic levels — from water to top predators like fish-eating birds.

Answer 1

The Correct Option is D

Biomagnification refers to the increasing concentration of a toxic substance like DDT as it moves up the food chain. In an aquatic ecosystem: - DDT first enters the water (B), - is absorbed by zooplankton (D), - then eaten by small fish (E), - which are consumed by large fish (C), - and finally eaten by fish-eating birds (A). At each level, the concentration of DDT increases.