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Science · 2026 · 2 marks
CBSE 2026 · Region 3 · Set 2 · Q12
In the following food chain, 5 J of energy is available to man. Calculate, how much energy was available at the producer level. Why? Plant ⟶ Goat ⟶…
In the following food chain, $\displaystyle 5$ J of energy is available to man. Calculate, how much energy was available at the producer level. Why ? Plant ⟶ Goat ⟶ Man
Marking-scheme solution
Plant → Goat → Man
According to $\displaystyle 10$ % Law, only $\displaystyle 10$ % of energy from a trophic level is transferred to the next trophic level.
So, if Man has $\displaystyle 5$ J energy then Goat has \(\displaystyle 5 \times 10=50 \mathrm{~J}\)
And plants (producers) have \(\displaystyle 50 \times 10=500\) Joule
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