DDT biomagnification — UPSC Prelims PYQ 1997
Which one of the following organisms is likely to show the highest concentration of DDT once it has been introduced into the ecosystem?
- Grasshopper
- Toad
- Snake
- Cattle
Explanation
Option (c) is correct
- DDT shows biomagnification in a food chain, meaning its concentration increases at successive trophic levels. Among the given organisms, the snake occupies the highest trophic level and therefore is likely to accumulate the highest concentration of DDT. Grasshopper and cattle are primary consumers, while the toad is a secondary consumer.
Answer: (c) Snake
