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(A) According to the $10\%$ law of energy transfer in an ecosystem,only $10\%$ of the energy available at one trophic level is transferred to the next

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$5000$

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(A) According to the $10\%$ law of energy transfer in an ecosystem,only $10\%$ of the energy available at one trophic level is transferred to the next higher trophic level.In the given food chain: Grass (Producer,$T_1$) $ightarrow$ Grasshopper $(T_2)$ $ightarrow$ Frog $(T_3)$ $ightarrow$ Snake $(T_4)$ $ightarrow$ Hawk $(T_5)$.The fourth trophic level $(T_4)$ is the Snake.Given: Energy at $T_4 = 5 \, kJ$.To find the energy at the producer level $(T_1)$,we move backwards by multiplying by $10$ for each step:Energy at $T_3 = 5 	imes 10 = 50 \, kJ$.Energy at $T_2 = 50 	imes 10 = 500 \, kJ$.Energy at $T_1$ (Producer) $= 500 	imes 10 = 5000 \, kJ$.Therefore,the energy available at the producer level is $5000 \, kJ$.

In the given food chain,suppose the amount of energy at the fourth trophic level is $5 \, kJ$,what will be the energy available at the producer level? (in $kJ$)
Grass $\rightarrow$ Grasshopper $\rightarrow$ Frog $\rightarrow$ Snake $\rightarrow$ Hawk

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In the given food chain,suppose the amount of energy at the fourth trophic level is $5 \, kJ$,what will be the energy available at the producer level? (in $kJ$)Grass $\rightarrow$ Grasshopper $\rightarrow$ Frog $\rightarrow$ Snake $\rightarrow$ Hawk