CBSE 2025 · Region 2 · Set 3 · Q33 · 3 marks
Some harmful chemicals get accumulated in human bodies through the food chain. Name this phenomenon. Explain the reason of maximum concentration of these chemicals found in our bodies.
Marking-scheme solution
Biological magnification
Reason: These chemicals are not biodegradable and they get accumulated over successive trophic levels. Since, human beings occupy the top level in a food chain, they are affected the most.
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.