Which of the following processes returns carbon from this vast reservoir to the active carbon cycle? ( more than one answer may be right) a. burning fossil fuels b. sedimentation c. photosynthesis d. decomposition of dead organisms

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

How does the nervous system affect the excretory system?

What drives an advertising campaign?