If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, what does that indicate? a. the gaseous outside of the sun contains oxygen. b. there is no oxygen in the sun. c. the sun burns its fuel using oxygen. d. the spectrum can be detected only by a radio telescope.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.