In a food chain consisting of four trophic levels,if the energy present in the top level is 48 kcal/m²/yr,how much energy do you expect in primary consumers? (Use an energy transfer rate of 10%. ) A)4.8 kcal/m²/yr B)48 kcal/m²/yr C)480 kcal/m²/yr D)4,800 kcal/m²/yr E)48,000 kcal/m²/yr

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The energy transfer rate is 10%, so each trophic level has 10 times the energy of the level above it. The top level has 48 kcal/m²/yr, so the level below it (secondary consumers) has 480 kcal/m²/yr, and the primary consumers have 4,800 kcal/m²/yr.

In a Food Chain Consisting of Four Trophic Levels,if the Energy