| Organism | Mercury concentration (parts per trillion) |
| P | 3,000 |
| Q | 6,90,000 |
| R | 8,900 |
| S | 2,800,000 |
| T | 16,000 |
A) \[\text{T}\to \text{Q}\to \text{P}\to \text{R}\to \text{S}\]
B) \[\text{P}\to \text{Q}\to \text{R}\to \text{S}\to \text{T}\]
C) \[\text{P}\to \text{R}\to \text{T}\to \text{Q}\to \text{S}\]
D) \[\text{T}\to \text{R}\to \text{S}\to \text{P}\to \text{Q}\]
Correct Answer: C
Solution :
Mercury is a non-biodegradable substance that gets biomagnified with each trophic level along a food chain. The first trophic level has the lowest concentration of the substance (here, P with 3000 parts per trillion concentration) and the highest trophic level has the maximum concentration (here S, with 2,80,000 parts per trillion concentration). Hence, as per the information generated in the table, the correct food chain in this terrestrial ecosystem will be \[\text{P}\to \text{R}\to \text{T}\to \text{Q}\to \text{S}\].
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