Which characteristic best distinguishes glycolysis and the krebs cycle from the electron transport chain?

What percentage of light hits earth's surface directly?

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.