Cellular (aerobic) respiration takes place in the presence of and with the use of a certain element. Which element is it?

carbon dioxide

water

sunlight

oxygen

What is the importantence of the carbon and nitretan cycles in the environment

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

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these