1. Where does the oxygen produced by photosynthesis come from?
a. gas in the atmosphere
b. carbon dioxide
c. glucose
d. water
2. What makes the reactants of photosynthesis and the reactants of cellular respiration similar?(1 point)
a. Both involve ATP molecules.
b. Both involve combinations of carbon, hydrogen, and oxygen.
c. Both involve combinations of glucose, water, and carbon dioxide.
d. Both involve light energy.
3. What is an advantage of using models to represent the carbon cycle?(1 point)
a. predicts conditions that will exist during future events
b. show a complete and detailed account of every event in the cycle
c. can collect data on the amount of carbon in the atmosphere at a specific time
d. can represent an entire system at once