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Science · 2022 · 3 marks
CBSE 2022 · Region 3 · Set 3 · Q10
(a)What are decomposers? State the role of decomposers in the natural replenishment of the soil.(b)Why are decomposers not helpful in decomposing the plastic waste?
(a)
What are decomposers? State the role of decomposers in the natural replenishment of the soil.
(b)
Why are decomposers not helpful in decomposing the plastic waste?
Marking-scheme solution
(a) • The microorganisms, that break down the dead remains and waste products of organisms into simpler substances.
Break down the complex organic wastes into simpler substances and return the nutrients to the soil so that these can be used again by the plants.
(b) Decomposers are not able to break down the plastics into its constituents therefore plastics cannot be decomposed. / Plastics are non-bio degradable.
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CBSE Class 10 Science past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.