Earth's atmosphere is about 21 percent oxygen. This percentage has remained about the same throughout humanhistory and even earlier. How have cellular respiration and photosynthesis helped maintain relatively constant1.oxygen levels?Cellular respiration helps maintain oxygen levels, while photosynthesis has no effect.Photosynthesis helps maintain oxygen levels, while cellular respiration has no effect.С.A.В.Cellular respiration removes oxygen from the atmosphere, while photosynthesis adds oxygen to theatmosphere.Photosynthesis removes oxygen from the atmosphere, while cellular respiration adds oxygen to theD.atmosphere.

We all know that the atmosphere of our Earth comprises of around 78% Nitrogen, 21% Oxygen and 1%…

1. Earth's atmosphere is about 21 percent oxygen. This percentage has remained about the same throughout human history and even earlier. How have cellular respiration and photosynthesis helped maintain relatively constant oxygen levels? Cellular respiration helps maintain oxygen levels, while photosynthesis has no effect. B. Photosynthesis helps maintain oxygen levels, while cellular respiration has no effect. C. A. Cellular respiration removes oxygen from the atmosphere, while photosynthesis adds oxygen to the atmosphere. D. Photosynthesis removes oxygen from the atmosphere, while cellular respiration adds oxygen to the atmosphere.

1. Earth's atmosphere is about 21 percent oxygen. This percentage has remained about the same throughout human history and even earlier. How have cellular respiration and photosynthesis helped maintain relatively constant oxygen levels? Cellular respiration helps maintain oxygen levels, while photosynthesis has no effect. B. Photosynthesis helps maintain oxygen levels, while cellular respiration has no effect. C. A. Cellular respiration removes oxygen from the atmosphere, while photosynthesis adds oxygen to the atmosphere. D. Photosynthesis removes oxygen from the atmosphere, while cellular respiration adds oxygen to the atmosphere.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter8: Photosynthesis

Section: Chapter Questions

Problem 3VCQ: Figure 8.18 Which of the following statements is true? In photosynthesis, oxygen, carbon dioxide,...

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