Question

1. what does the size of each level in an energy pyramid represent? a. the age of the organisms b. the physical size of organisms c. the amount of available energy d. the number of species 8. which trophic level has the largest population size? a. tertiary consumers b. secondary consumers c. primary consumers d. producers 9. what happens to 90% of the energy at each trophic level? a. it is stored for later use b. it is lost as heat and in life processes c. it is converted to biomass d. it is transferred to the next level

Explanation:

For the first question, an energy pyramid's level size represents available energy. For the second, producers have the largest population as they form the base of the food - chain and support other levels. For the third, 90% of energy at each trophic level is lost as heat and in life processes due to the inefficiency of energy transfer.

Answer:

1. c. The amount of available energy
2. d. Producers
3. b. It is lost as heat and in life processes