The point at which there is no net exchange of gases between leaves and atmosphere is known as_____________?
Correct answer: B. Compensation point
- A. Neutral point
- B. Compensation point
- C. Parallel point
- D. Competitive point
Explanation
At the compensation point, the rate of carbon dioxide uptake and oxygen release in photosynthesis equals the rate of respiratory gas exchange, so there is no net gas exchange with the atmosphere. Students may choose neutral point because it sounds equivalent, but compensation point is the established biological term.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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