Consider the pyramid of energy of an ecosystem given below: If T_4...

According to the given pyramid of energy, if $\mathrm{T}_4$ is equivalent to 1000 J , then according to the 10 percent law, which states that only 10 percent of energy is transferred to each trophic level from the lower trophic level, the value at $\mathrm{T}_1$ is $10,00,000 \mathrm{~J}$. $$\begin{aligned} & T_1=10,00,000 \mathrm{~J} \\ & T_2=\frac{10}{100} \times 10,00,000=1,00,000 \mathrm{~J} \\ & T_3=\frac{10}{100} \times 100000=10,000 \mathrm{~J} \\ & T_4=\frac{10}{100} \times 10000=1000 \mathrm{~J}\end{aligned}$$