Scientists and other citizens are concerned that carbon dioxide levels are increasing in Earth's atmosphere. Plants perform both photosynthesis and cellular respiration.Could increasing Earth's population of plants affect carbon dioxide levels?a. No, photosynthesis and cellular respiration do not involve carbon dioxide.b. No, in plants, photosynthesis adds as much carbon dioxide to the atmosphere as cellular respiration removes.c. Yes, it would decrease the levels. Photosynthesis acts to remove carbon dioxide from the atmosphere and store the carbon in plant tissues.d. Yes, it would increase the levels. Photosynthesis releases more carbon dioxide into the atmosphere than cellular respiration removes.

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