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Carbon dioxide absorption is an appropriate indicator of photosynthesis because?
Carbon dioxide absorption is an appropriate indicator of photosynthesis because?1) Plants produce oxygen gas by splitting CO₂.
2) CO₂ is needed to complete the light reactions.
3) CO₂ is needed to produce sugars in the Calvin cycle.
4) The energy in CO₂ is used to produce ATP and NADPH.
Final answer:CO₂ absorption indicates photosynthesis activity because it is necessary for the Calvin cycle, where CO₂ is used to produce glucose, demonstrating close linkage to the photosynthetic process.Explanation:Carbon dioxide absorption is an appropriate indicator of photosynthesis because CO₂ is needed to produce sugars in the Calvin cycle. The correct answer is option 3)CO₂ is needed to produce sugars in the Calvin cycle. Photosynthesis is a two-stage process involving the light-dependent reactions and the Calvin cycle. While the light-dependent reactions convert light energy into chemical energy and release oxygen by splitting water, the Calvin cycle uses the chemical energy from the light-dependent reactions to fix and reduce CO₂ into organic compounds like glucose. Therefore, observing the uptake of CO₂ is directly related to the photosynthesis process....