Q: About how much energy would be transferred to tertiary consumers if the producers begin with 25,000 kilocalories?

Flexi Says: As only about 10 percent of the energy at one level is available to the next level limits the number of trophic levels possible in an ecosystem. If the producers begin with 25,000 kcal then energy transferred to the primary consumer is: 25000 x 0.10 = 2500 kcal. Energy transferred to the secondary consumer is: 2500 x 0.10 = 250 kcal. Energy transferred to the tertiary consumer is: 250 x 0.10 = 25 kcal.