Which of the following occurs during photosynthesis? A) CO2 is used to produce water.
B) CO2 is absorbed by Mitochondria
C) CO2 and H2O are converted to carbohydrates
D) CO2 and H2O are combined into carbonic acid.

Aprimary producer stores 9,000 kcal. in the energy pyramid, if a primary producer is consumed by a first-level consumer, and that first-level consumer is consumed by a second-level consumer and the second-level consumer is consumed by a third-level consumer, how much energy is stored by the third-level consumer from the primary producer? *