[Campbell Biology P.834] According to Figure 36.2 and the accompanying text, which of the fo... | Practice Question

According to Figure 36.2 and the accompanying text, which of the following statements about gas exchange in a vascular plant during the day are correct? Select all that apply

  • A: Leaves and green stems take up CO2 and release O2 through stomata during photosynthesis.
  • B: Root cells exchange gases with soil air, taking in O2 and discharging CO2 for cellular respiration.
  • C: All O2 produced during photosynthesis in leaves is released into the air.
  • D: Water vapor is taken in through stomata as part of transpiration.
  • E: Sugar is exchanged as a gas from leaves.

Explanation

Figure 36.2 and its descriptions clearly state that leaves and green stems exchange CO2 and O2 via stomata during photosynthesis, and root cells exchange O2 and CO2 with soil air for cellular respiration. Some O2 produced by photosynthesis is used by the plant, not all is released.