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Science · 2025 · 2 marks
CBSE 2025 · Region 6 · Set 2 · Q26
Indicate the flow of energy in a food chain operating in an ecosystem. Why is it uni-directional? Give reason.
Indicate the flow of energy in a food chain operating in an ecosystem. Why is it uni-directional ? Give reason.
Marking-scheme solution
Flow of energy:
Sun ⟶ Producer ⟶ Herbivore ⟶ Carnivore
The energy flow always progresses from one trophic level to another and does not revert back / energy captured by autotrophs does not revert back to solar input / the energy which passes to the herbivore does not come back to autotrophs.
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