CBSE 2025 · Region 4 · Set 1 · Q33 · 3 marks
What are decomposers? Give two examples. State how they maintain a balance in an ecosystem.
Marking-scheme solution
Decomposers are the microorganisms which breakdown the complex organic substances into simple inorganic substances.
Examples: bacteria and fungi
The simple substances formed by decomposition go into the soil and are used up once more by the plants, thus maintain balance of ecosystem..
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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.