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Science · 2023 · 3 marks
CBSE 2023 · Region 2 · Set 1 · Q33
Explain how some harmful chemicals enter our bodies through the food chain. Why is the concentration of these harmful chemicals found to be maximum…
Explain how some harmful chemicals enter our bodies through the food chain. Why is the concentration of these harmful chemicals found to be maximum in human beings ?
Marking-scheme solution
Some harmful substances like pesticides are used to protect crops. When these chemicals are washed down in the soil or water bodies, they are absorbed by plants along with water and minerals and by animals from water. When we consume these food items, the pesticides enter our body.
(Alternate answer : If the child explains the question through food chain, credit marks.)As human beings occupy the top level in any food chain, maximum concentration of these chemicals get accumulated in them.
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.